Chia:
a) ($x^{3}$ – $x^{2}$ -5x -3) : (x + 1)
b) ($x^{3}$ – 7x + 6) : (x – 2)
c) ($x^{3}$ + x$y^{2}$ – 2$y^{3}$) : (x – y)
Chia: a) ($x^{3}$ – $x^{2}$ -5x -3) : (x + 1) b) ($x^{3}$ – 7x + 6) : (x – 2) c) ($x^{3}$ + x$y^{2}$ – 2$y^{3}$) : (x – y)
By Liliana
ý a; = x^2-2x-3
= ( x-3) .(x+1)
ý b =x^2+2x-3
=( x-1) .( x+3)
ý c = 2y^2+xy -x^2
Giải thích các bước giải:
`a; = x^2-2x-3`
`= ( x-3) .(x+1)`
`b =x^2+2x-3`
`=( x-1) .( x+3)`
`c = 2y^2+xy -x^2`