Question

(x+3)^2-8(x+3)+16
FIND ITS FACTOR

Answer 1

Let (x+3) be p

$p {}^{2} - 8 p + 16 \\ p {}^{2} - 4p - 4p + 16 \\ p(p - 4) - 4(p - 4) \\ (p - 4)(p - 4)$
(x+3-4)(x+3-4)
(x-1)(x-1)