4acx + 4bcx + 4ax + 4bx
= 4cx ( a+ b) + 4x ( a+b)
= 4x ( c +1 )(a +b)
Phân tích đa thức thành nhân tử:
\(4acx+4bcx+4ax+4bx\)
\(=\left(4acx+4ax\right)+\left(4bcx+4bx\right)\)
\(=4ax\left(c+1\right)+4bx\left(c+1\right)\)
\(=\left(4ax+4bx\right)\left(c+1\right)\)
\(=4x\left(a+b\right)\left(c+1\right)\)