a.
\(5x^2\left(x-2y\right)-15x\left(x-2y\right)\)
\(=\left(x-2y\right)\left(5x^2-15x\right)\)
\(=5x\left(x-2y\right)\left(x-3\right)\)
b.
\(3\left(x-y\right)-5x\left(y-x\right)\)
\(=3\left(x-y\right)+5x\left(x-y\right)\)
\(=\left(x-y\right)\left(3+5x\right)\)
\(a,5x^2\left(x-2y\right)-15x\left(x-2y\right)\)
\(=5x\left(x-2y\right)\left(x-3\right)\)
\(b,3\left(x-y\right)-5x\left(y-x\right)=3\left(x-y\right)+5x\left(x-y\right)\)
\(=\left(x-y\right)\left(3+5x\right)\)
Chúc bạn học tốt!
a) \(5x^2\left(x-2y\right)-15x\left(x-2y\right)=\left(x-2y\right)\left(5x^2-15x\right)=\left(x-2y\right)5x\left(x-3\right).\)
\(b.3\left(x-y\right)-5\left(y-x\right)=3\left(x-y\right)+5\left(x-y\right)\)
\(=\left(3+5\right)\left(x-y\right)=8\left(x-y\right)\)
ý b nhìn sai đầu bài, sorry nha!
b) = \(\left(3-5x\right)\left(x-y\right)\)