so sanh 12 mu 8 va 8 mu 12
(-5)mu 39 va (-2)mu 91
cho cac da thuc
A=x mu 2-2x-y+3y-1
B= -2x mu 2+3y mu 2-5x+y+3
a)Tinh: A+B ; A-B
b)Tinh gia tri cua da thuc A tai x=1;y =-2
P=(x-4) mu (x-5) mu (x-6) mu (x+6) mu (x+5)
tim so huu ti x,y biet: (3x-30) mu 2016+/y-3/ be hon hoac bang 0
\(x+\left(-\frac{31}{12}\right)^2=\left(-\frac{49}{12}\right)^2-x=y^2\)
Tìm x và y , Giúp tớ nha .
Tìm x
x + \(\left(\frac{-31}{12}\right)^2\) = \(\left(\frac{49}{12}\right)^2\) - x = y2
Tìm x, y biết:
a, |x|+12=10
b, |x+8|=12
c, |x.y|= -2
Tìm x biết:
x+2/11 + x+2/12 + x+2/13 = x+2/14 + x+2/15
-2.x+3.(x-2)+9=12+4x