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2x(2x)+7(2x)-9(2x)+7(-9) = 2x(2x)+2(2x)-5(2x)-5(3)

4x²+14x-18x-63 = 4x²+4x-10x-15

then simplify both sides,

4x²-6x-63 = 4x²-6x-15

the equation is FALSE because the constants are not the same.

(2x-9)(2x+7)=(2x-5)(2x+3)

2x(2x)+2x(7)-9(2x)-9(7)=2x(2x)+2x(3)-5(2x)-5(3)

4x2 + 14x- 18x - 63 = 4x2 + 6x - 10x - 15

4x2 - 4x - 63 = 4x2 - 4x - 15