Question

Phân tích đa thức thanh nhân tử:

x²+x-6

Answer 1

\(x^2+x-6\)

\(=x^2+3x-2x-6\)

\(=\left(x^2+3x\right)-\left(2x+6\right)\)

\(=x\left(x+3\right)-2\left(x+3\right)\)

\(=\left(x+3\right)\left(x-2\right)\)

Answer 2

x²+x-6

=x²+3x-2x-6

=(x²+3x)-(2x+6)

=x(x+3)-2(x+3)

=(x+3)(x-2)

Answer 3

\(x^2+x-6=x^2+3x-2x-6\)

\(=\left(x^2+3x\right)-\left(2x+6\right)\)

\(=x\left(x+3\right)-2\left(x+3\right)\)

\(=\left(x-2\right)\left(x+3\right)\)