(2) Answers

4x^2 + 8x - 21 = (2x - 3)(2x + 7) <==

4x^2+8x-21 4x^2-6x+14x-21 2x(2x-3)+7(2x-3) (2x+7)(2x-3)

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(2) Answers

4x^2 + 8x - 21 = (2x - 3)(2x + 7) <==

4x^2+8x-21 4x^2-6x+14x-21 2x(2x-3)+7(2x-3) (2x+7)(2x-3)

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