# data[].attributes.attachment_caption
Thực hiện tối thiếu 3 ý trong thời gian 7 phút

# data[].attributes.body
Thực hiện tối thiểu 1 ý trong thời gian 5 phút

# data[].attributes.body
4x^4-9x^2
=(2x^2-3x)(2x^2+3x)

# data[].attributes.body
4x^4-9x^2
= x^2(4x^2-9)
=x^2[(2x-3)(2x+3)]

# data[].attributes.body
a, 4x^4-9x^2
=(2x^2-3x)(2x^2+3x)

# data[].attributes.body
4x^4-9x^2
=x^2(4x^2-9)
=x^2(2x-3)(2x+3)

# data[].attributes.body
a) 4x^4-9x^2
= (2x^2-3x)(2x^2+3x)

# data[].attributes.body
a. 4x^4- 9x^2
= (2x^2- 3x) (2x^2+3x)

# data[].attributes.body
4x^4-9x^2
= (2x^2-3x).(2x^2+3)

# data[].attributes.body
a) 4x^4-9x^2
= x^2(4x^2-9)
= x^2(2x-3)(2x+3)

# data[].attributes.body
4x^4-9x^2
=x^2(4x^2-9)
=x^2(2x-3)(2x+3)

# data[].attributes.body
a) 4x^4 - 9x^2
= x^2( 4x^2 - 9 )
=x^2( 2x - 3 )( 2x + 3 )

# data[].attributes.body
= x^2 ( 4x^2 - 9 )
= x^2 ( 2x- 3 ) ( x + 3 )

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z)(x-y-z)

# data[].attributes.body
4x^4-9x^2
= x^2(4x^2-9)
=x^2 (2x-3)(2x+3)

# data[].attributes.body
a,4x^4-9x^2
=x^2(4x^2-9)
=x^2(2x-3) (2x+3)

# data[].attributes.body
a)4x^4 - 9x^2
= (2x^2)^2 - (3x)^2
(2x^2-3x)(2x^2+3x)
= x^2(4x^2 - 3^2)
x^2[(2x-3)(2x+3)] ?

# data[].attributes.body
4x^4-9x^2
= x^2(4x^2-9)
=x^2 (2x-3)(2x+3)

# data[].attributes.body
b) x^2-2xy+y^2-z^2
=(x^2-2xy+y^2)-z^2
=(x-y)^2-z^2
=[(x-y)-z][(x-y)+z)]

# data[].attributes.body
4x^4 - 9x^2
= x^2 (4x^2 - 9)
= x^2 (2x-3) (2x+3)

# data[].attributes.body
x^2 - 2xy + y^2 - z^2

=(x-y)²-z²

=(x-y-z)(x-y+z)

# data[].attributes.body
b,x^2 - 2xy + y^2 - z^2
= ( x - y )^2 - z^2
= ( x - y + z) ( x - y - z )

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z)(x-y-z)

# data[].attributes.body
b, x^2-2xy +y^2-x^2
=(x+y)^2 - z^2
= (x-y-z)(x-y+z)

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x^2-2xy+y^2)-z^2
=(x-y)^2-z^2
=[(x-y)-z][(x-y)+z)]

# data[].attributes.body
a) 4x^4-9x^2
=(2x^2-3x)(2x^2+3x)

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z).(x-y-z)

# data[].attributes.body
3x^2+6xy+3y^2-3z^2
=3(x^2+2xy+y^2-z^2)
=3[(x+y)^2-z^2]
=3(x+y-z)(x+y+z)

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z)(x-y-z)

# data[].attributes.body
4x^4-9x^2
=x^2(4x^2-9)
=x^2(2x-3)(2x+3)

# data[].attributes.body
x^2 - 2xy +y^2 - z^2
=(x^2 - 2xy +y^2) - z^2
=(x-y)^2 - z^2
= (x-y-z) (x-y+z)

# data[].attributes.body
x^2 - 2xy + y^2 - z^2

=(x-y)^2-z^2

=(x-y-z)(x-y+z)

# data[].attributes.body
x^2-4x+3
= x^2-4x+4-1
= (x-2)^2 -1
= (x-2-1)(x-2+1)
=(x-3)(x-1)

# data[].attributes.body
4x^2 - 9x^2
= (2x^2 - 3x)(2x^2 + 3x)

# data[].attributes.body
x^2 - 2xy + y^2 - z^2

=(x-y)²-z²

=(x-y-z)(x-y+z)

# data[].attributes.body
b)x^2 - 2xy + y^2 - z^2
=( x - y )^2 - z^2
=( x - y + z)(x - y - z)

# data[].attributes.body
3x^2 + 6xy + 3y^2 – 3z^2

= 3.(x^2 + 2xy + y^2 – z^2)

= 3[(x^2 + 2xy + y^2) – z^2]

= 3[(x + y)^2 – z^2]

= 3(x + y – z)(x + y + z)

# data[].attributes.body
c, 3x^2 + 6xy + 3y^2 - 3z^2
=3 ( x^2 + 2xy + y^2 - z^2 )
=3 [ ( x + y )^2 - z^2]
=3 ( x + y - z )( x + y + z )

# data[].attributes.body
3x^2+6xy+3y^2-3z^2
=3(x^2+2xy+y^2-z^2)
=3[(x+y)^2-z^2]
=3(x+y-z)(x+y+z)

# data[].attributes.body
c. 3x^2+ 6xy+3y^2-3y^2
= 3(x^2+ 2xy+ y^2- z^2)
= 3(x+y-z) (x+y+z)

# data[].attributes.body
3x^2+6xy+3y^2-3z^2
=3(x^2+2xy+y^2-z^2)
=3[(x+y)^2-z^2]
=3(x+y+z).(x+y-z)

# data[].attributes.body
3x^2+6xy+3y^2-3z^2
=(3x^2+6xy+3y^2-3z^2)
=3(x^2+2xy+y^2-z^2)
=3[(x+y)^2-z^2]
=3(x+y-z)(x+y+z)

# data[].attributes.body
b,x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z) (x-y-z)

# data[].attributes.body
3x^2 + 6xy + 3y^2 - 3z^2
= 3 (x^2 + 2xy + y^2 - z^2)
= 3 [(x^2+2xy+y^2) -z^2]
= 3 [(x+y)^2 - z^2]
= 3(x+y-z) (x+y+z)

# data[].attributes.body
x^2 - 4x + 3
= x^2 – x – 3x + 3
= x(x – 1) – 3(x – 1)
= (x – 1)(x – 3)

# data[].attributes.body
=3(x^2+2xy+y^2-z^2)
=3((x+y)^2-z^2)
=3(x+y-z)(x+y+z)

# data[].attributes.body
4x^4-9x^2
= x^2(4x^2-9)
x^2(2x-3)(2x+3)

# data[].attributes.body
x^2-4x+3
=x^2-x-3x+3
=(x-3)(x-1)

# data[].attributes.body
x^2-2xy+y^2-z^2+2zt-t^2
=(x^2-2xy+y^2)-(z^2-2zt+t^2)
=(x-y)^2-(z-t)^2
=(x-y-z+t)(x-y+z-t)

# data[].attributes.body
x^2-2xy+y^2-z^2
=(x-y)^2-z^2
=(x-y+z) (x-y-z)

# data[].attributes.body
= 3 (x^2 + 2xy + y^2 - z^2)
= 3 [(x^2+2xy+y^2) -z^2]
= 3 [(x+y)^2 - z^2]
= 3(x+y-z) (x+y+z)

# data[].attributes.body
3x2 + 6xy + 3y2 – 3z2

= 3.(x2 + 2xy + y2 – z2)
= 3[(x2 + 2xy + y2) – z2]

= 3[(x + y)2 – z2]

= 3(x + y – z)(x + y + z)

# data[].attributes.body
x^2-2xy+y^2-z^2+2zt-t^2
=(x^2-2xy+y^2)-(z^2-2zt+t^2)
=(x-y)^2-(t+z)^2
=(x-y-t+z)(x+y+t-z)

# data[].attributes.body
3x^2+6xy+3y^2-3z^2
=3(x^2+2xy+y^2-z^2)
=3[(x+y)^2-z^2]
=3(x+y-z)(x+y+z)

# data[].attributes.body
x^2-2xy+y^2-z^2+2zt-t^2
=( x^2-2xy+y^2 )-( z^2-2zt+t^2 )
=( x-y )^2-( t+z )^2
=( x-y-t+z )( x+y+t-z )

# data[].attributes.body
x2 – 2xy + y2 – z2 + 2zt – t2
= (x2 – 2xy + y2) – (z2 – 2zt + t2)
= (x – y)2 – (z – t)2
= [(x – y) – (z – t)][(x – y) + (z – t)]

= (x – y – z + t)(x – y + z –t)

# data[].attributes.body
Ta có M= (a^3+b^3)-(a^2b+ab^2)

=(a+b)(a^2+ab+b^2)-ab(a+b)

=(a+b)(a^2+b^2)

Thay a=5,75 ; b=4,25 vào M ta có M=(5,75+4,25)(5,75^2+4,25^2)

=511,25

# data[].attributes.body
x^2 + 5x – 4xy – 10y + 4y^2
= (x^2 – 4xy + 4y^2) + (5x – 10y)

= (x – 2y)^2 + 5(x – 2y)

= (x – 2y + 5)(x –2y)

# data[].attributes.body
Câu abcd