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The mistake is the red line cancelling the 2 because they dont cancel out the 2 on the numerator is together with the coefficient

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The cancelation of the 2's. The 2's are different. One is multiplying, while the other adds.

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You cannot cancel out 2x with X+2 because they are not the same.

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The mistake is the cancelation. The problem can no longer be simplified than what it already is.

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You cannot cancel x with x when its connected to another value

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2 multiplied by x has different value to 2 plus x- cant cancel

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You cant cancel out x when it has a number connected to it.

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thats illegal

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They did the difference of squares wrong its supposed to be (x+2) (x-2)

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Should have factored instead to make it look like : (x-2)(x+2)

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Should have divided by three to both the 9 and six since they are bother divisible by three: 3+ 2x

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The cancelation of the x's.

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The cancelation of X was not needed

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You can't cancel out the x's, you would need to use factoring to solve this problem

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They didn't divide the 6.