Question

Answer 1

Bài 1:

a) \(=3x^3+3x^2-3x^3+2x^2+3x-2+2\)

\(=5x^2+3x\)

b) \(=4x^2+4x+1-x^2+9-3x^2+x\)

\(=5x+10\)

c) \(=8x^3+12x^2+6x+1-8x^3-27+6x-12x^2\)

\(=12x-26\)

Bài 2:

a) \(=3x\left(x^2-4xy+4y^2\right)=3x\left(x-2y\right)^2\)

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

c) \(=\left(x-y\right)^2-16=\left(x-y-4\right)\left(x-y+4\right)\)

Answer 2

bài 1 a)3x³+3x²+2x²-3x³-2+3x+2

          =(3x³-3x³)(3x²+2x²)+3x

          =5x²+3x

b)4x²+4x+1-x²+9-3x²+x

  =(4x²-x²-3x²)+(4x+x)+(1+9)

  =5x+10

c)