Question

lm bằng pp tách hạng tử

 

Answer 1

\(x^2-2x+6x-12\\ =x\left(-2\right)+6\left(x-2\right)\\ =\left(x+6\right)\left(x-2\right)\)

Answer 2

\(x^2+4x-12=x^2-2x+6x-12=x\left(x-2\right)+6\left(x-2\right)=\left(x+6\right)\left(x-2\right)\)

Answer 3

x2+4x−12=x2−2x+6x−12=x(x−2)+6(x−2)=(x+6)(x−2)