1.x2+(1+x)2+(x+x2)22.(x+y)4+(x2-y2)2+(x-y)4

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1.x2+(1+x)2+(x+x2)22.(x+y)4+(x2-y2)2+(x-y)4
1.x2+(1+x)2+(x+x2)2
2.(x+y)4+(x2-y2)2+(x-y)4

1.x2+(1+x)2+(x+x2)22.(x+y)4+(x2-y2)2+(x-y)4
x² + (1 + x)² + (x + x²)²
= (x² + x)² + (x² + 2x + 1) + x²
= (x² + x)² + 2(x² + x) + 1
= (x² + x + 1)²
(x+y)4+(x2-y2)2+(x-y)4
=(x+y)^4+(x+y)^2(x-y)^2+(x-y)^4
=(x+y)^4+2(x+y)^2(x-y)^2+(x-y)^4-(x+y)^2(x-y)^2
=[(x+y)^2+(x-y)^2]^2-(x^2-y^2)^2
=(2x^2+2y^2)^2-(x^2-y^2)^2
=[(2x^2+2y^2)+(x^2-y^2)][(2x^2+2y^2)-(x^2-y^2)]
=(3x^2+y^2)(x^2+3y^2)

计算(x3+x2+x+2)/(x2+1) 十字相成法1.x2+2x-82.x2+5x+63.x2-8x+124.x2+x-205.2x2+9x+46.7x2-5x-27.8x2+2x-1 1.(x-y)(x2+xy+y2) 2.求值x2(x-1)-x(x2+x-1),其中x=2分之一化简x/x2+x除以x2+x-2/x2-1+x+1/x+2 解方程：X2--1/8(X2+2X)+X2+2X/3(X2--1)=11 y=x+√(1-x2) y2=x2+(1-x2)+2x√(1-x2) 解方程 2/(x2-x)+6/(1-x2)=7/(x2+x)x2为的平方 1.x2+(1+x)2+(x+x2)22.(x+y)4+(x2-y2)2+(x-y)4 (x2-3x)2-x(x2-3x)-2x2 化简x-1分之x+1-x2-1分之x2-2x÷x2-x-2/x2+2x+1 3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x 通分 3x/x2-2x,2x+1/4-x2,3/2x2+4x 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 x2+(x+1)2+x2(x+1)2因式分解因式分解 (x2+2x)2+2x2+4x+1 2( x2 +1/x2) - 9( x + 1/x) + 14 = x2+(1+x)2+(x+x2)2因式分解, 因式分解(x2+x+1)(x2+x+2)-12=