1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+41.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)

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1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+41.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)
1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4
1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)

1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+41.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)
1.x^4+3x²y²+4y^4
=x^4+4x²y²+4y^4-x²y²
=(x^2+2y^2)^2-x²y²
=(x^2+2y^2-xy)(x^2+2y^2+xy)
2.x^4+4
=x^4+4x^2+4-4x^2
=(x^2+2)^2-4x^2
=(x^2+2-2x)(x^2+2+2x)
3.x²-2x-a²+2a
=x²-a²-2x+2a
=(x-a)(x+a)-2(x-a)
=(x-a)(x+a-2)
4.(x+y)²-4x-4y+4
=(x+y)²-4（x+y）+4
=(x+y-2)²
5.x(x-2)-a(a-2)
=x²-2x-a²+2a
=x²-a²-2x+2a
=(x-a)(x+a)-2(x-a)
=(x-a)(x+a-2)
6.(x+y)²-4(x+y-1)
=(x+y)²-4（x+y）+4
=(x+y-2)²

1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²] 这些完全平方公式等于多少?1.(x+y+z)²-（x-y-z)² 2.a²(a-b)²-b²（a+b)² 3.(x+y)²-16(x-y)² 4.16-(2a+3b)² 5.(a²+4)²-16a² 6.x²-xy+1/4y² 关于分式约分题,1.x²-y²/x²+2xy+y²2.x²+4x+3/ x²+x-63.m²+3m/9-m² 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急（3x-2y)²(3x-2y)²(9x²+4y²）² 4m²（2x-3y)²-m²（3x-2y)²=? 3x²-y²=8x²＋xy＋y²=4 （X-3）²+(Y+4)²=1 求X²+Y²的最大值（X-3）²+(Y+4)²=1 求X²+Y²的最大值因式分解请帮下忙!因式分解：1.（x+y）²-4（x+y）-12 2.x²+（k+2）x+(k+1） 3.（x²+3x）²-8（x²+3x）-204.（t² +4t）² -2（t² +4t）-24 5.4a² b² -（a² +b² ）² 1.(x+y)²-4xy=( )²2.x²-（）+25y²=（ )²3.x²-8x²y²+16y四次方=（）²4.7.2²-2.8²= . 1.（b²+2a²）（2a²-b²） 2.（4x²-4y²）（x²+y²） 3.—（x-1）（x+1）-3（x+2）（x-2） 4.（5y²+4x²）[4y²+（2x-y）（-2x-y）] 1.（ax+by)²+（bx－ay)²2.(x²-x)²-4(x²-x-1)3.4(x+y)²-9(x-y)²4.(a+b)(a-b)+4(b-1)5.x²+4xy+4y²-2x-4y-36.(x+1)(x+2)(x+3)(x+4)+17,3x²-11x+10 求几道因式分解1.（ax+by)²+（bx－ay)²2.(x²-x)²-4(x²-x-1)3.4(x+y)²-9(x-y)²4.(a+b)(a-b)+4(b-1)5.x²+4xy+4y²-2x-4y-36.(x+1)(x+2)(x+3)(x+4)+17,3x²-11x+10 因式分解、平方差公式进行分解1.x²(y-4)-(y-4)2.2x²-323.已知a+b=8且a²-b²=48.则a-3b=4.x²-4y²5.-x²+x²y²6.a²(a-b)+b²(b-a)7.(a+b)²-(a-b)²8.4x²-59.x²-1610.x^3+x² 初二下学期分解因式[数学]1.a(x-y)-b(y-x)+c(x-y)2.x(m+n)-y(n+m)+(m+n)3.(x+y)²-16(x-y)²4.a²(a-b)²-b²(a+b)²5.(x+y+z)²-(x-y-z)²6.x²y-2xy²+y³7.16-(2a+3b)²8.(a²+4)²-16a²9. 1.（x-2/x+2+6x/x²-4）×（x²-4）2.(1+x²-1/x²-2x+1)÷1/x-13.x²/x²-y²÷1/x+y+y²/y-x4.（1/x+1-1/1-x²)÷3x/x+1 1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+41.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)