Question

phân tích thành nhân tử

a)x^2a - x^2b - y^2a + y^2b

k) 5x^2 - 5xy - 10x + 10y

Answer 1

5x^2-5xy-10x+10y

(5x^2-5xy )-(10x-10y)

5x(x-y)-10(x-y)

(x-y)(5x-10)

Answer 2

a)\(x^2a-x^2b-y^2a+y^2b=x^2\left(a-b\right)-y^2\left(a-b\right)=\left(a-b\right)\left(x^2-y^2\right)=\left(a-b\right)\left(x-y\right)\left(x+y\right)\)

k) \(5x^2-5xy-10x+10y=5x\left(x-y\right)-10\left(x-y\right)=\left(x-y\right)\left(5x-10\right)\)

Answer 3

\(5x^2-5xy-10x+10y=5x\left(x-y\right)-10\left(x-y\right)=\left(x-y\right)\left(x-2\right)5\)