(X2 -y+1)(X2+1)+X2y+y -X2因式分解

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(X2-y+1)(X2+1)+X2y+y-X2因式分解(X2-y+1)(X2+1)+X2y+y-X2因式分解(X2-y+1)(X2+1)+X2y+y-X2因式分解(X^2-y+1)(X^2+1)+X^

(X2 -y+1)(X2+1)+X2y+y -X2因式分解
(X2 -y+1)(X2+1)+X2y+y -X2因式分解

(X2 -y+1)(X2+1)+X2y+y -X2因式分解
(X^2 -y+1)(X^2+1)+X^2y+y -X^2
=(X^2 -y+1)(X^2+1)+(X^2+1)y -X^2
=(X^2 -y+y+1)(X^2+1) -X^2
=(X^2+1)^2-x^2
=(x^2+x+1)(x^2-x+1)

原式=(x^2-y+1)(x^2+1)+y(x^2+1)-x^2
=(x^2+1)(x^2-y+1+y)-x^2
=(x^2+1)(x^2+1)-x^2
=(x^2+1)^2-x^2
=(x^2+x+1)(x^2-x+1)

(X2 -y+1)(X2+1)+X2y+y -X2因式分解 x2+y2-x2y-4xy-1因式分解当x=2011,y=2012时,求代数式3x3-4x3y2+3x2y+2x2+4x3y2+2x2y-5x2-5x2y+x-y+1的值 (-2x2y)3+8(x2)2*(-x2)*(-y)3 帮解决下因式分解的简答题1、3x2y-6xy 2、4x2-25y2 3、x2-3xy+2y2 4、x2y-y5、4x2-(y-Z)2 6、a4-2a2b2+b4 当x=-1,y=1时求代数式2x2y-(5xy2-3x2y)-x2的值字母后面的2是平方已知(x+3)2+1x-y+101=0,求5x2y-[2x2y-(3xy-xy)2-3x2]-2xy-y2 已知x+y=8,xy=12,求(1)x2y+xy2(2)x2-xy+y2(3)x-y 一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y- 化简-x2-3x+2x2+4x.xy2-2/3x2y-xy2/2+2x2y.2a-1/2ab-（a2-ab） -3x2+2x2y+xy2 xy-1+x-y 十字相乘法因式分解怎么做啊xy-1+x-y x2y-3xy-2x+6 3x2+4xy+y2 求下列微分方程的通解或在给定初始条件下的特解y'+x2y=x2,y(2)=1 因式分解：x2－9a2＋12a－4；x2y+3xy2-x-3y；1-x2-2xy-y2；3a2+2b-2ab-3a；x2+y2+2xy+ax+ay；3x4-48y48a3-4a2-2a+1；x2-3xy-28y2；(x2-x)^2-4(x2-x)-12 3（3x2y-xy2+3）-2（2x2y+xy2-2）化简一个多项式加上5x2+3x-2的二倍得1-3x2+x,求这3（3x2y-xy2+3）-2（2x2y+xy2-2）化简一个多项式加上5x2+3x-2的二倍得1-3x2+x,求这个多项式.1.3（3x2y-xy2+3）-2（2x2y+xy2-2）化简若x2y＋xy2＝30,xy＝6,求下列代数式的值：（1）x2＋y2；（2）x－y. 几道关于整式加减数学题,=1.3x+2xy-4y2-3xy=4y2-3x22.3x3-[x3+(6x2-7x)]-2(x3-3x2-4x)3.(3x2-4y2)+[-（x2-2xy-y2）]-[-(3x2-2xy-y2)]4.已知：(x=2)2+|y=1|=0,求5xy2-{2x2y-[3x2y-(4xy2-2x2y)]}的值5.如果A=3m2-m+1,B=2m2-m-7且A-B+C=0,求C以上 y=x+√(1-x2) y2=x2+(1-x2)+2x√(1-x2)