tinh gia tri cua cac da thuc sau biet x+y-2=0.M=x^4+2x^3y-2x^3+x^2y^2-2x^2y-x(x+y)+2x+3
tinh gia tri cua bieu thuc sau:
3x^4+5x^2y^2+2y^4+2y^2 biet rang x^2+y^2=1
Cho x+y-2=0.tinh gia tri cua da thuc :M=x^3+×^2y-xy-y^2×3y+x-1
1) Cho x:y:z = 5:4:3.Tinh gia tri bieu thuc biet Y = \(\frac{x+2y-3z}{x-2y+3z}\)
tinh gia tri cua bieu thuc A=2005x+2006y/2005x-2006y biet x/2=y/3
tinh gia tri bieu thuc:
a,3x^4+5x^2y^2+2y^4+2y^2 biet rang x^2+y^2=1
tinh gia tri bieu thuc:
a,3x^4+5x^2y^2+2y^4+2y^2 biet rang x^2+y^2=1
tinh gia tri bieu thuc:
a,3x^4+5x^2y^2+2y^4+2y^2 biet rang x^2+y^2=1
tinh giai tri c bieu thuc M=(2x-1)(2y-1)
biet x+y=10 va xy=16
