1 1 x 2 1 x² 4 1 x四次方 8 1 x八次方-搜答案-神马作文网

2x^5-5x^4-11x^3+23x^2+9x-18=2x^5-2x^4-3x^4+3x^3-14x^3+14x^2+9x^2-9x+18x-18=2x^4(x-1)-3x^3(x-1)-14x^2

16x四次方-72x²+81=（4x²)²-2×4x²×9+9²=(4x²-9)²=(2x+3)²(2x-3)²

-16x四次方+81y二次方=(9y+4x^2)(9y-4x^2)不懂可追问,有帮助请采纳,谢谢!再问：数学的寒假作业还没做完==作业要做八下的题都不会咋办再答：不回答追问里的新问题，请采纳了再提问，

7x^4-11x²y²-6y^4=（x²-2y²）（7x²+3y²）=（x-√2y）（x+√2y）（7x²+3y²）②7

请采纳,谢谢!

题目是不是这样：在实数范围内因式分解(x四次方+y四次方)-4x二次方y二次方=?x^4+y^4-4x^2*y^2=(x^2+y^2)^2-2x^2*y^2-4x^2*y^2=(x^2+y^2)^2-

x四次方y四次方-2x²y²-3x四次方y四次方=-2x四次方y四次方-2x²y²=-2x²y²(2x²y²+1)

原式=(x²-10)(x²-1)=(x²-10)(x+1)(x-1)

x^4+y^4=x^4+2x^2y^2+y^4-2x^2y^2=(x^2+y^2)^2-2x^2y^2=(x^2+y^2+√2*xy)(x^2+y^2-√2*xy)

x²+x+1=0x+1+1/x=0x+1/x=-1两边平方得x²+2+1/x²=1x²+1/x²=-1两边平方得x^4+2+1/x^4=1x^4+1/

-(x3)4+3×（x2）4·x4=-x3×4+3×（x2×4+4=2x12

x^4+3x^3-3x^2-11x-6=x^3(x+3)-3x(x+3)-2(x+3)=(x^3-3x-2)(x+3)=(x+1)(x^2-x-2)(x+3)=(x+1)(x+1)(x-2)(x+3)

x⁴-7x²y²+81y⁴=x⁴+18x²y²+81y⁴-25x²y²=(x²+9

令a=2x-y,b=2y-x,a+b=(2x-y)+(2y-x)=x+y(2x-y)四次方+(x+y)四次方+(2y-x)四次方=a四次方+(a+b)四次方+b四次方=(a+b)四次方+(a四次方+2

2的4次方-x的4次方=(2²+x²)(2²-x²)=(4+x²)(2+x)(2-x)很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意

x^4-11x^2+1=(x^4-2x^2+1)-9x^2=(x^2-1)^2-(3x)^2=(x^2+3x-1)(x^2-3x-1)

=(9x平方-1)平方=(3x-1)平方(3x+1)平方

学习愉快!

-16x^4+81y^4=(9y^2-4x^2)(9y^2+4x^2)=(3y-2x)(3y+2x)(9y^2+4x^2)