Question

(2x-5)whole square
$(2x - 5) {?}^{2}$

Answer 1

(2x-5)²
=(2x-5) * (2x-5)
= 2x(2x-5) - 5(2x-5)
= 4x²-10x-25

Answer 2

(2x-5)^2=2x^2-2×2x×5+(-5)^2 by the formula (a-b)^2=a^2-2ab+b^2
=4x^2-20x-25 Ans

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