Question

phân tích đa thức thành nhân tử :

7a^2-7ax-9a+9x

Answer 1

\(7a^2-7ax-9a+9x=\left(7a^2-7ax\right)-\left(9a-9x\right)=7a\left(a-x\right)-9\left(a-x\right)=\left(a-x\right)\left(7a-9\right)\)

Answer 2

7a(a-x)-9(a-x)

(7a-9)(a-x)

Answer 3

\(7a^2-7ax-9a+9x=7a\left(a-x\right)-9\left(a-x\right)=\left(7a-9\right)\left(a-x\right)\)