Question

(7+5x) (7-5x) -(2x-3) (2x-3)
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Answer 1

Answer:

$(7+5x) (7-5x) -(2x-3) (2x-3) \\ \\ (49 - 25 {x}^{2} ) - {(2x - 3)}^{2} \\ \\ 49 - 25 {x}^{2} - 4 {x}^{2} - 9 + 12x \\ \\ - 29 {x}^{2} + 12x + 40$

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