Question

Phân tích đa thức thành nhân tử :

\(15x^2+7x-2\)

Answer 1

\(15x^2+7x-2\)

\(=15x^2+10-3x-2\)

\(=5x\left(3x+2\right)-\left(3x+2\right)\)

\(=\left(3x+2\right)\left(5x-1\right)\)

Answer 2

15x²+7x+2=15x²+10x-3x-2

=5x.(3x+2)-(3x+2)

=(3x+2)(5x-1)