Question

(x - a)(x + b) = x2 -(a-b)

Answer 1

Step-by-step explanation:

TO PROVE:

$(x - a)(x +b ) = {x}^{2} - (a - b) - ab$

PROOF:

$(x -a )(x + b) \\ = x(x + b) - a(x + b) \\ = {x}^{2} + bx - ax - ab \\ = {x}^{2} + x(b - a) - ab \\ = {x}^{2} + </em><em>[</em><em> - a + b</em><em>]</em><em>x</em><em> - ab \\ = {x}^{2} - (a - b)x - ab$

Hence,proved ↑

Answer 2

Answer:

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