若圆(x-a)平方 (y-a)平方=4
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1,(x+y)²-x²y²=(x+y)²-(xy)²=(x+y+xy)(x+y-xy)2,-2a立方b平方+8a平方b平方-8ab平方=-2ab
(x+a)²一(y一b)²=[(x+a)+(y-b)][(x+a)-(y-b)]=(a+a+y-b)(x+a-y+b)
x^2(a-b)+y(b-a)=x^2(a-b)-y(a-b)=(a-b)(x^2-y)-49+36x^2y^2=36x^2y^2-49=(6xy-7)(6xy+7)64(a-b)^2-25(a+b)
原式=a²(x-y)²+2a(x-y)³+(x-y)^4=(x-y)²[a²+2a(x-y)+(x-y)²]=(x-y)²[a+(
xy(x-y)-x(x-y)平方=(x-y)[xy-x(x-y)]=(x-y)[2xy-x^2]=(x-y)*x(2x-y)-a平方+1.9b平方=(b根号1.9+a)(b根号1.9-a)-12xy+
x-a的绝对值+(y-2)的平方=0,则x-a=0,y-2=0,则x=a,y=22A-B=4x²+4x-6y²-(4x²-y-6y²)=4x+y=6所以4a+2
y=ln(x+√(x²+a²))y′=(1+x/√(x²+a²))/(x+√(x²+a²))=1/√(x²+a²)y″=
是绝对值x-2y+(y+3)的平方=0,则x-2y=0,y+3=0所以y=-3x=2y=-6B-2A=a所以A=(B-a)/2=(4x²-6xy+2y²-3x-y-2x²
(x-a)^2+y^2=4圆心为C(a,0),在x轴上,半径为2抛物线y^2=6x,焦点F(3/2,0)圆与抛物线没有公共点,当圆心在x轴负半轴上时,若a=-2,圆心为(-2,0),那么圆过原点与抛物
3a(x-y)-2(y-x)^2=3a(x-y)-2(x-y)^2=(x-y)[3a-2(x-y)]=(x-y)(3a-2x+2y)
(4x-3y)²-16y²=(4x-3y+4y)(4x-3y-4y)=(4x+y)(4x-7y)x²+2x(y-z)+(z-y)²=x²+2x(y-z
(a-b)+x平方(b-a)=(a-b)-x^2(a-b)=(a-b)(1-x^2)=(a-b)(1-x)(1+x)4M平方—(m+n)平方=(2m)^2-(m+n)^2=(2m-m-n)(2m+m+
(2a的平方+3a)-3(a的平方-a)=-a^2+6a(3x的平方+2xy+2y的平方)-(x的平方-xy+y的平方)=2x的平方+3xy+y的平方5(m的平方-2m+1)-(3m的平方-13m+7
再答:采纳我的好吗?再答:采纳吧再问:哦
4a(x-y)的平方-2b(y-x)的平方+(y-x)=4a(x-y)的平方-2b(x-y)的平方-(x-y)=(x-y)[4a(x-y)-2b(x-y)-1]=(x-y)(4ax-4ay-2bx+2
原式=(a²+b²+2ab)(a²+b²-2ab)=(a+b)²(a-b)²原式=a²(x-y)-b²(x-y)=(x-
a(x²+2xy+y²)-b(x²-y²)=a(x+y)²-b(x+y)(x-y)=(x+y)(ax+ay-bx+by)再问:你确定对吗?和我已开始算
3a²x²y²-27a²=3a²(x²y²-9)=3a²(xy-3)(xy+3)
a^(x+y)×a^(x-y)=a^10a^(x+y+x-y)=a^10a^(2x)=a^102x=10x=5