\(a,=x\left(2x-3y\right)-3\left(2x-3y\right)=\left(2x-3y\right)\left(x-3\right)\\ b,=9z^2-\left(x^2+4xy+4y^2\right)=\left(3z\right)^2-\left(x+2y\right)^2=\left(3z-x-2y\right)\left(3z+x+2y\right)\)
Đúng 2
Bình luận (0)