Question

1.Phân tích thành nhân tử 

a.5x+15x^2y-2xy^2

b.2x(x-5)-x+5

c.3x(x+1)+x+1

d.x^3+2x^y+xy^2

e.5x(x-1)-3(1-x)

 

Answer 1

b) \(2x\left(x-5\right)-x+5\)

\(=2x\left(x-5\right)-\left(x-5\right)\)

\(=\left(2x-1\right)\left(x-5\right)\)

Answer 2

e) \(5x\left(x-1\right)-3\left(1-x\right)\)

\(=5x\left(x-1\right)+3\left(x-1\right)\)

\(=\left(5x+3\right)\left(x-1\right)\)

Answer 3

c) \(3x\left(x+1\right)+x+1\)

\(=3x\left(x+1\right)+\left(x+1\right)\)

\(=\left(3x+1\right)\left(x+1\right)\)

Answer 4

a, (-x)(2y^2-15xy-5)

e, (x-1)(5x+3)

Answer 5

a) \(5x+15x^2y-2xy^2\)

\(=x\left(5+15xy-2y^2\right)\)