3x2+2x-8
=3x2+6x-4x-8
=(3x2+6x)-(4x+8)
=3x(x+2)-2(2x+4)
=3x(x+2)-2(2(x+2)
=3x(x+2)-4(x+2)
=(3x-4)(x+2)
CHÚC BẠN HỌC TỐT
`3x^2 +2x-8`
`= 3x^2 + 6x - 4x -8`
`= 3x(x+ 2) - 4(x+2)`
`= (3x-4)(x+2)`
3x2+2x−83x2+2x-8
=3x2+6x−4x−8=3x2+6x-4x-8
=3x(x+2)−4(x+2)=3x(x+2)-4(x+2)
=(3x−4)(x+2)