Question

1)5x^3+10x^2+5x
2) x^3+5x^2-6x
3)5x(2x-3)-7(3-2x)
4)3x(x-2019)-x+2019
5)3x(x-2)-2x+4
6)x^2-9-3(x+3)^2
Ai giúp tớ với ạ.Tớ c.ơn

Answer 1

1: \(=5x\left(x^2+2x+1\right)=5x\left(x+1\right)^2\)

2: \(=x\left(x^2+5x-6\right)=x\left(x+6\right)\left(x-1\right)\)

3: \(=\left(2x-3\right)\left(5x+7\right)\)

4: \(=\left(x-2019\right)\left(3x-1\right)\)

5: \(=3x\left(x-2\right)-2\left(x-2\right)=\left(x-2\right)\left(3x-2\right)\)

6: \(=\left(x-3\right)\left(x+3\right)-\left(x+3\right)\left(3x+9\right)\)

\(=\left(x+3\right)\left(x-3-3x-9\right)=\left(x+3\right)\left(-2x-6\right)\)

\(=-2\left(x+3\right)^2\)