Question

（x+1)的平方+8（x+1)+16=0因式分解

Answer 1

(x+1)^2+8(x+1)+16=0(x+1)^2+2·(x+1)·4+4^2=0 [(x+1)+4]^2=0 (x+5)^2=0若要求解,则x=-5