Question

Answer 1

Bài 1: 

a: \(2x^2+7x+5=\left(x+1\right)\left(2x+5\right)\)

b: \(-5x^2+16x-3=-\left(5x^2-16x+3\right)=-\left(x-1\right)\left(5x-3\right)\)

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

Answer 2

Bài 2: 

a: \(x^4-x^3-x^2+1\)

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

\(=\left(x-1\right)\left(x^3-x-1\right)\)

b: \(x^2-2xy-y^2+y^2\)

\(=x^2-2xy\)

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

c: \(4x^2+4x+1-9y^2\)

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

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