Question

Giúp mình bài 1,2,3 phần trắc nghiêm nhé

Answer 1

Bài 1:

a: \(2xy+3z+6y+xz\)

\(=2y\left(x+3\right)+z\left(x+3\right)\)

\(=\left(x+3\right)\left(z+2y\right)\)

b: \(x^2-6x-7\)

\(=x^2-7x+x-7\)

\(=\left(x-7\right)\left(x+1\right)\)

c: \(16x^2-\left(x+1\right)^2\)

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

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