Question

(x-7) (x+5) please show detailed answer​

Answer 1

x²+5x-7x-35

x²-2x-35

x²-7x+5x-35

x(x-7)+5(x-7)

x+5=0. x-7=0

x=-5. x=7

Answer 2

We have,

$\quad (x - 7)(x + 5) \\ \\ = x(x + 5) - 7(x + 5) \\ \\ = x(x) + x(5) - 7(x) - 7(5) \\ \\ = {x}^{2} + 5x - 7x - 5 \\ \\ = {x}^{2} - 2x - 5$