Question

Tìm GTNN

\(\left(x-1\right)\left(x+3\right)\left(x+2\right)\left(x+6\right)\)

Answer 1

A=(x^2+5x-6)(x^2+5x+6)

=(x^2+5x)^2-36>=-36

Dấu = xảy ra khi x=0 hoặc x=-5