a, (x-3).(2x+5) b, 2xy. 3x*2y b, x(x*2-2x+5) d, (3x*2-6x) :3x e, (x*2-2x+1):(x-1) Giúp mk với 30/07/2021 Bởi Jade a, (x-3).(2x+5) b, 2xy. 3x*2y b, x(x*2-2x+5) d, (3x*2-6x) :3x e, (x*2-2x+1):(x-1) Giúp mk với
a,(x-3)(2x+5) =2x²+5x-6x-15 =2x²-x-15 b,2xy*3x*3y =2xy*9xy =18x²y² c,x(x²-2x+5) =x³-2x²+5x d,(3x²-6x):3x =3x²:3x-6x:3x =x-2 e,(x²-2x+1):(x-1) =(x-1)²:(x-1) =x-1 Chúc bạn học tốt nhé! ^^ Bình luận
$a, (x-3)(2x+5)$ $=2x^2+5x-6x-15$ $=2x^2-x-15$ $b, 2xy.3x^2.y$ $=6x^3y^3$ $c, x(x^2-2x+5)$ $=x^3-2x^2+5x$ $d, (3x^2-6x):3x$ $=x-2$ $e, (x^2-2x+1):(x-1)$ $=(x-1)^2:(x-1)$ $=x-1$ $(Học tốt nhé!)$ Bình luận
a,(x-3)(2x+5)
=2x²+5x-6x-15
=2x²-x-15
b,2xy*3x*3y
=2xy*9xy
=18x²y²
c,x(x²-2x+5)
=x³-2x²+5x
d,(3x²-6x):3x
=3x²:3x-6x:3x
=x-2
e,(x²-2x+1):(x-1)
=(x-1)²:(x-1)
=x-1
Chúc bạn học tốt nhé! ^^
$a, (x-3)(2x+5)$
$=2x^2+5x-6x-15$
$=2x^2-x-15$
$b, 2xy.3x^2.y$
$=6x^3y^3$
$c, x(x^2-2x+5)$
$=x^3-2x^2+5x$
$d, (3x^2-6x):3x$
$=x-2$
$e, (x^2-2x+1):(x-1)$
$=(x-1)^2:(x-1)$
$=x-1$
$(Học tốt nhé!)$