Question

Phân ích hành nhân
a) 40x²y - 8xy - 16x²y²

b) (x-y)(x+y)-3(x-y)    

c)(x-y)² -5(x-y)

Answer 1

a, \(40x^2y-8xy-16x^2y^2=8xy\left(5x-1-2xy\right)\)

b, \(\left(x-y\right)\left(x+y\right)-3\left(x-y\right)=\left(x-y\right)\left(x+y-3\right)\)

c, \(\left(x-y\right)^2-5\left(x-y\right)=\left(x-y\right)\left(x-y-5\right)\)

Answer 2

a) 40x²y - 8xy - 16x²y²

= 8xy( 5x - 1 - 2xy)

b) (x-y)(x+y)-3(x-y)    

= (x - y)( x + y - 3)

c)(x-y)² -5(x-y)

=(x - y)(x - y - 5)

Answer 3

a) \(40x^2-8xy-16x^2y^2\)

\(=4x\cdot10x-4x\cdot2y-4x\cdot4xy\)

\(=8x\left(5x-y-2xy\right)\)

b) \(\left(x-y\right)\left(x+y\right)-3\left(x-y\right)\)

\(=\left(x-y\right)\left(x+y-3\right)\)

c) \(\left(x-y\right)^2-5\left(x-y\right)=\left(x-y\right)\left(x-y-5\right)\)