Giúp m 2 bài này nhé Question Giúp m 2 bài này nhé in progress 0 Môn Toán Farah 4 years 2020-10-17T21:51:56+00:00 2020-10-17T21:51:56+00:00 1 Answers 102 views 0
Answers ( )
$\text{Bài 1:}$
`a,x^2+2x`
`=x(x+2)`
`b,5x^2(x-2y)+3x(x-2y)`
`=(5x^2+3x)(x-2y)`
`=x(5x+3)(x-2y)`
`c,3(x-z)-5x(z-x)`
`=3(x-z)+5x(x-z)`
`=(3+5x)(x-z)`
`d,-x^3+5x^2`
`=x^2(5-x)`
`e,3x^3z^3-6x^2y^2+9xz`
`=3x(x^2z^3-2xy^2+3z)`
`f,7x^2(x-3y)-14xy(3y-x)`
`=7x^2(x-3y)+14xy(x-3y)`
`=(7x^2+14xy)(x-3y)`
`=7x(x+2y)(x-3y)`
$\text{Bài 2:}$
`B=(2x-1)^2+2x(2x-1)+x^2`
`=4x^2-4x+1+4x^2-2x+x^2`
`=9x^2-6x+1`
`C=(x-1)(x+1)-(x+3)^2`
`=x^2-1-x^2-6x-9`
`=-6x-10`