Question

Giúp tôi bài 2

Answer 1

Câu 2: 

a: \(=x^3+4x^2+5x^2+20x+6x+24\)

\(=\left(x+4\right)\left(x^2+5x+6\right)\)

\(=\left(x+4\right)\left(x+2\right)\left(x+3\right)\)

b: \(=4x^4-12x^2+9-25x^2\)

\(=\left(2x^2-3\right)^2-25x^2\)

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

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

\(=\left(x-3\right)\left(2x+1\right)\left(x+3\right)\left(2x-1\right)\)

c: \(=6x^3-2x^2-15x^2+5x+9x-3\)

\(=\left(3x-1\right)\left(2x^2-5x+9\right)\)

d: \(=x^3+5x^2-5x^2-25x+6x+30\)

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

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