\(4x^2+4x-3=4x^2+6x-2x-3\)
\(=\left(4x^2+6x\right)-\left(2x+3\right)=2x\left(2x+3\right)-\left(2x+3\right)\)
\(=\left(2x+3\right)\left(2x-1\right)\)
\(4x^2+4x-3=4x^2+6x-2x-3\)
\(=\left(4x^2+6x\right)-\left(2x+3\right)\)
\(=2x.\left(2x+3\right)-\left(2x+3\right)\)
\(=\left(2x+3\right).\left(2x-1\right)\)
Chúc bạn học tốt!!!
4x^2+4x-3=4x^2+6x-2x-3
=(4x^2+6x)-(2x+3)
=2x(2x++3)-1(2x+3)
=(2x+3) (2x-1)