Toán Lớp 8: a) x( x2 – 5x)
b) (x + 3y)(2x – y)
c) ( 4×3 – 2×2+ 6x) : 2x
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 8: a) x( x2 – 5x)
b) (x + 3y)(2x – y)
c) ( 4×3 – 2×2+ 6x) : 2x
Comments ( 2 )
Giải đáp:
$a,$ $x(x^2-5x)$
$=x.x^2-5x.x$
$=x^3-5x^2$
$b,$ $(x+3y)(2x-y)$
$=2x^2-xy+6xy-3y^2$
$=2x^2+5xy-3y^2$
$c,$ $(4x^3-2x^2+6x):2x$
$=(4x^3:2x)+(-2x^2:2x)+(6x:2x)$
$=2x^2-x+3$
Giải đáp:
Lời giải và giải thích chi tiết:
a,x^-5x^2
b,2x^2-xy+6xy-3y^2
c,2x^2-x+3