已知x+y=10,xy=24,求x^2+y^2
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/15 21:32:10
已知x+y=10,xy=24,求x^2+y^2已知x+y=10,xy=24,求x^2+y^2已知x+y=10,xy=24,求x^2+y^2x^2+y^2=(x+y)^2-2xy=10^2-2*24=1
已知x+y=10,xy=24,求x^2+y^2
已知x+y=10,xy=24,求x^2+y^2
已知x+y=10,xy=24,求x^2+y^2
x^2+y^2
=(x+y)^2-2xy
=10^2-2*24
=100-48
=52
完全平方公式:(a+b)²=a²+2ab+b²
x²+y²=(x+y)²-2xy=10²-2×24=100-48=52
52
x^2+y^2=(x+y)^2-2xy=10^2-2*24=100-48=52
(x+y)^2=100
x^2+y^2+2xy=100
x^2+y^2=100-2xy=100-48=52
x^2+y^2=(x+y)^2-2xy=100-48=52
x^2+y^2=(x+y)^2-2xy=100-48=52
x^2+y^2
=x^2+y^2+2xy-2xy
=(x+y)^2-2xy
=100-48
=52
(X+Y)^2=X^2+Y^2+2XY
所以:
x^2+y^2就=(X+Y)^2-2XY
x^2+y^2就=52
52啦
已知X+y=10,XY=24,求(X-Y)(X-Y)的值
已知x+y=10,xy=24,求x^2+y^2
已知x-xy=8,xy-y=-9,求x+y-2xy的值
已知x+y=3,xy=-10,求(1)x平方-xy+y平方;(2)|x-y|
已知x+y=-2,求代数式(6xy+10y)+[4x-2(3xy+2y-x)]
已知2x+xy=10,3y+2xy=6.求4x+8xy+9y=?
已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy
已知:x>0,y>0,且x- 10√xy+25y=0,求2x+√xy+3y/x+√xy-y
已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.
已知x+y=-10,xy=16求x²+y²,(x-y)²,(x+2)(y+2),x²-xy+y².求值!
已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
已知:x-xy=40,xy-y=-20,求代数式x-y和x+y-2xy的值.
已知x-xy =21,xy-y=-12,分别求式子x-y与x-2xy +y
已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值
已知x+y=3xy,求2x+2y-xy/x+y+2xy的值、
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y)
已知x-y=3xy,求2x+3xy-2y/x-2xy-y