Question

Answer 1

giup minh bai 1,2,3 voi

 

Answer 2

Bài 2: 

a: \(=3x^2+15x-2x-10=\left(x+5\right)\left(3x-2\right)\)

b: \(=x^2\left(x-4\right)-3\left(x-4\right)=\left(x-4\right)\left(x^2-3\right)\)

c: \(=2x^4+6x^2-x^2-3=\left(x^2+3\right)\left(2x^2-1\right)\)

d: \(=\left(x+2\right)\left(x^2-2x+4\right)-3x\left(x+2\right)\)

\(=\left(x+2\right)\left(x-4\right)\left(x-1\right)\)

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

f: \(=x\left(x^2-4x+4-y^2\right)\)

\(=x\left(x-2-y\right)\left(x-2+y\right)\)