Các câu hỏi tương tự
A=(2x-3)2-(x-3)3+(4x+1)(16x2-4x+1) voi x=-2 rut gon va tinh gia tri
lam kieu dang toan 8 ho minh nha
M=(x2-2x/2x2+8 - 2x2/8-4x+2x2-x3)*(1-1/x-2/x2)
a, Rut gon M
b,Tinh M voi x=1/2
c,tinh x de M<0
rut gon phan thuc
14x^2+ 7xy
4x^2 - y^2
2. x^3 - 8
2x^3 - 8x
giup minh nha cam on truoc
Rut gon:
A=(x-2)^2-(2x+1)^2
B=(x-2y)^2-(x-2y) .(2y+x)
C=(x+1)^3-(x-2)^3
D=(x-1)^2-2(x-1)(x+1)+(x+1)^2
E=(x+2y)^2+2(x+2y)(x-2y)+(2y-x)
G=(2x+1)^3-(2x-1)
Giai het ho minh nha! Minh dang can gap
rut gon bieu thuc a,(3x+2)^2+4x-3^2+2(5x-2)(5x+2)-75x^2
b,(x-2)^3+(2x+1)^3++2(x+2)(1-x)-9x^3+2x
cho P=(2+x/2-x+4x^2/x^2-4-2-x/2+x):x^2-3x/2x^2-x^3
a) tim dieu kien cua x de gia tri cua P xac dinh
b) rut gon P
mn giup minh voi
tim x biet
a) 4(x+1)^2-9(x+2)^2=0
b) 4(x+1)^2+(2x-1)^2-8(x+1)(x-1)=11
giai cach lam giup minh nha
tìm x biet;
1) x2 - 2x + 4x -8 = 0
2) x(x+3)-3x -9 =0
3) x2 - 6x + 5 = 0
các ban giai giup minh nha
( x + 1 )2 +3( x - 5)(x+ 5)-( 2x-1)2
giup minh voi cac ban
de bai la rut gon