Question

tách thành nhân tử x^2 + 24x + 128

Answer 1

\(=x^2+8x+16x+128=x\left(x+8\right)+16\left(x+8\right)=\left(x+8\right)\left(x+16\right)\)

Answer 2

\(x^2+24x+128=x^2+2.x.12+144-16=\left(x+12\right)^2-\left(4\right)^2=\left(x+12-4\right)\left(x+12+4\right)=\left(x+8\right)\left(x+16\right)\)