Question

Phân tích thành nhân tử: 
2(a-2b)+3a(2b-a)
a(m-n)-5(n-m)
 

Answer 1

\(2\left(a-2b\right)+3a\left(2b-a\right)=2\left(a-2b\right)-3a\left(a-2b\right)=\left(2-3a\right)\left(a-2b\right)\)

\(a\left(m-n\right)-5\left(n-m\right)=a\left(m-n\right)+5\left(m-n\right)=\left(a+5\right)\left(m-n\right)\)

Answer 2

a) Ta có: \(2\left(a-2b\right)+3a\left(2b-a\right)\)

\(=2\left(a-2b\right)-3a\left(a-2b\right)\)

\(=\left(a-2b\right)\left(2-3a\right)\)

b) Ta có: \(a\left(m-n\right)-5\left(n-m\right)\)

\(=a\left(m-n\right)+5\left(m-n\right)\)

\(=\left(m-n\right)\left(a+5\right)\)