4x+2=16x²-4

1.(x+y)²-4xy=( )²2.x²-（ ）+25y²=（ )²3.x²-8x²y²+16y四次方=（ ）²4.7.2²-2.8²= . 怎么算啊这个：X²+4X+Y²-2Y+5=0 则X²+Y²=?²²²²²²²²²²²²X²+4X+Y²-2Y+5X=0 则X²+Y²=? 问几道有关分式的数学题 ,(1)[(5xy)/(x²+xy)]*[(xy+y²)/(2x²y²)]^3(2)[(x^3-3x+4)/(x²+2x-3)]÷[(x²-16)/(x²+6x+9)](3)(x²+x-3)/(x²+x-2)+1=(2x²+4x+1)/(x²+2x+1)(4)已知a²+4a+1=0 ,且(a^4+ xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1 化简再求值[(x²+y²）²-4x²y²]÷(x²-y²）其实,x=2,y=2/3. x²+2x+2 / x+1=x²+4x+6 / x+2 -1 4m²（2x-3y)²-m²（3x-2y)²=? 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy （3x-2)²=4(x-3)² 8分之1x²+6x-16=0x²-4根号2 x-1=0（2x+7）²=4（2x+7）3x²-（x-2）²=12 x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗? 一道分式化简求值先化简,再代值[(x+2)/(x²-2x) – (x-1)/(x²-4x+4)]÷(x²-16)/(x²+4x)其中x=2+根2 解方程⑴2(x²+1/x²)-3(x+1/x)=1；⑵x²+3/x-4x/x²+3=3 已知x>2,求函数y=2x²-8x+16/x²-4x+4的值域 1.因式分解(1) 1-4x²y²(2) 16m²+25n²+40mn(3) 2a³-12a²x+18ax²2.填空(1)9x²-( )+b²=( -b)²(2)x^4+4x²+( )=(x²+ )²(3)p²-3p+( )=(p- )²(4)25a²+24a+( )=5a+( )²麻烦写 1.（3x²+10x²+13x-27)/(x²+2x-3)2.（2x²+x³-2）/（x²-1)3.已知A=(3x)²-21x³-2x²+11x-2 B=3x³-5x²-4x+1求a²/b² 4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算 (x²-4分之x²+x+1)²÷(x三次方-3x²+2x÷x三次方)²×(x÷x+2)² ,