x的平方 4y的平方-2xy 12y 12=0求x和y的值
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原式=(2x-y)(2x+y)(4x^2+y^2)=(4x^2-y^2)(4x^2+y^2)=16x^4-y^4
(1)x的平方-y的平方+4x+4y=(x+y)(x-y)+4(x+y)=(x+y)(x-y+4)(2)x的平方*y的平方+1-x的平方-y的平方=x²y²-x²+1-y
原式=(x²+y²+2xy)(x²+y²-2xy)/(x+y)²=(x+y)²(x-y)²/(x+y)²=(x-y)
十分简单x^2-2xy+y^2+y^2-4y+4=0(x-y)^2+(y-2)^2=0x=y=2x^2+y^2=8
(4x²-y²)/(2xy+y²)=(2x+y)(2x-y)/y(2x+y)=(2x-y)/y
=-(x+2y)(x-2y)/(x+y)²×2x(x+y)/(x-2y)=-2x(x+2y)/(x+y)=-(2x²+4xy)/(x+y)
4x^2-3y^2=73x^2+2y^2=19相加7x^2-y^2=26所以14x^2-2y^2=2(7x^2-y^2)=2*26=52
4/x-15x²y再问:朋友,发一下过程再答:3x²y-(-3x)²×(2y)+x³y²/(x²x²y²/4)=3x
化简:(xy)^2-10xy+25+y^2-4y+4=0∴(xy-5)^2+(y-2)^2=0∴xy=5,y=2∴x=2.5代入,得:x^2y^2+2x^3*y^2+x^4*y^2=150+625/4
((x-y)(x-y))/((x-y)(x+y))=(x-y)/(x+y).
原式=9x⁴/16y²*2y/3x+x²/2y²*x/2y²=3x³/8y+x³/4y⁴=(3x³y
(x+2y)的平方-4x的平方=(x+2y+2x)(x+2y-2x)=(3x+2y)(2y-x)
{(x的平方+y的平方)-(x的平方-y的平方)+2y(x-y)}除4y=(2y^2+2y(x-y)/(4y)=2xy/(4y)=x/2
x的平方乘y的平方-4-2x的平方乘y的平方=-x的平方乘y的平方-4
(x^2+y^2)^2-4x^2y^2=(x^2+y^2+2xy)(x^2+y^2-2xy)=(x+y)^2*(x-y)^2=(x^2-y^2)^2数学佰亊嗵为你解答,希望我的回答为您带来帮助!
x8+256y8-32x4y4(用手机打的不要介意,给个最佳答案吧)
(x的平方-4Y的平方)-(x+2y)²=(x+2y)(x-2y)-(x+2y)²=(x+2y)(x-2y-x-2y)=-4y(x+2y)(x的平方-y的平方)(x+y)-(x-y
x的平方-2xy+y的平方-4=(x-y)²-2²=(x-y+2)(x-y-2)再问:(3a-7)的平方-(a+5)的平方这个呢?再答:(3a-7)的平方-(a+5)的平方=(3a
x的平方-x-4y的平方+2y=(x-2y)(x+2y)-(x-2y)=(x-2y)(x+2y-1)
x-y分之2x的平方-y-x分之x的平方-4xy+x-y分之2y的平方-x的平方=2x/(x-y)-(x²-4xy)/(y-x)+(2y-x²)/(x-y)=(2x+x²