Question

phân tích thành nhân tử

1. 12x² + 7x -12

2 . 2m² + 10m + 8

Answer 1

1, \(12x^2+7x-12=12x^2+16x-9x-12=\left(3x+4\right)\left(4x-3\right)\)

2, \(2m^2+10m+8=2m^2+2m+8m+8=\left(2m+8\right)\left(m+1\right)\)

Answer 2

\(12x^2+7x-12=12x^2-9x+16x-12\)

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

\(2m^2+10m+8=2m^2+2m+8m+8\)

\(=2m\left(m+1\right)+8\left(m+1\right)=2\left(m+4\right)\left(m+1\right)\)

Answer 3

\(1.12x^2+7x-12=\left(4x-3\right)\left(3x+4\right)\\ 2.2m^2+10m+8=2\left(m+1\right)\left(m+4\right)\)

Answer 4

1: \(12x^2+7x-12\)

\(=12x^2+16x-9x-12\)

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

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

2: \(2m^2+10m+8\)

\(=2\left(m^2+5m+4\right)\)

\(=2\left(m+1\right)\left(m+4\right)\)