Question

Bài 2:Phân tích các đa thức sau thành nhân tử:

  a)  x³- 2x²+ x                       b) x²– 2x – 15                                c) 5x²y³– 25x³y⁴+ 10x³y³             

  d) 12x²y – 18xy²– 30y²         e) 5(x-y) – y.( x – y)                     f) 4x²+ 12x + 9 

Answer 1

b: =(x-5)(x+3)

f: \(=\left(2x+3\right)^2\)

Answer 2

\(a,=x\left(x^2-2x+1\right)=x\left(x-1\right)^2\\ b,=x^2-5x+3x-15=\left(x-5\right)\left(x+3\right)\\ c,=5x^2y^3\left(1-5xy+2x\right)\\ d,=6y\left(2x^2-3xy-10y\right)\\ e,,=\left(x-y\right)\left(5-x\right)\\ f,=\left(2x+3\right)^2\)