Question

1)   Phân tích đa thức thành nhân tử

a)    xy² – 25x

b)   x(x – y) + 2x – 2y

c)    x³ – 3x² – 4x + 12

Answer 1

\(a,=x\left(y^2-25\right)=x\left(y-5\right)\left(y+5\right)\\ b,=x\left(x-y\right)+2\left(x-y\right)=\left(x+2\right)\left(x-y\right)\\ c,=x^2\left(x-3\right)-4\left(x-3\right)\\ =\left(x-2\right)\left(x+2\right)\left(x-3\right)\)

Answer 2

Answer 3