几道因式分解题^:几次方x^4+x^3+x^2-1x^4-3x^2+1x^4-7x^ ×2y^2+81y^4x^8+x^4+12(x^2-3ab)+x(4a-3b)x^4-7x^ ×2y^2+81y^4 ×是乘号
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/27 01:38:56
几道因式分解题^:几次方x^4+x^3+x^2-1x^4-3x^2+1x^4-7x^ ×2y^2+81y^4x^8+x^4+12(x^2-3ab)+x(4a-3b)x^4-7x^ ×2y^2+81y^4 ×是乘号
几道因式分解题
^:几次方
x^4+x^3+x^2-1
x^4-3x^2+1
x^4-7x^ ×2y^2+81y^4
x^8+x^4+1
2(x^2-3ab)+x(4a-3b)
x^4-7x^ ×2y^2+81y^4 ×是乘号
几道因式分解题^:几次方x^4+x^3+x^2-1x^4-3x^2+1x^4-7x^ ×2y^2+81y^4x^8+x^4+12(x^2-3ab)+x(4a-3b)x^4-7x^ ×2y^2+81y^4 ×是乘号
x^4+x^3+x^2-1 = x^3(x+1) + (x+1)(x-1)=(x+1)(x^3+x-1)
x^4-3x^2+1 = x^4-2x^2+1-x^2 = (x^2-1)^2-x^2 =
(x^2+x-1)(x^2-x-1)
x^4-7x^ ×2y^2+81y^ 请确认题目
x^8+x^4+1 = x^8+2x^4+1-x^4=(x^4+1)^2-x^4 =
(x^4+x^2+1)(x^4-x^2+1)
2(x^2-3ab)+x(4a-3b) = 2x^2+(4a-3b)x-6ab =
(x+2a)(2x-3b)
x^4+x^3+x^2-1
=x^3*(x+1)+(x+1)*(x-1)=(x+1)*(x^3+x-1);
x^4-3x^2+1
=(x^2-(3+sqrt(5))/2)*(x^2-(3-sqrt(5))/2)
=(x-sqrt((3+sqrt(5))/2))*(x+sqrt((3+sqrt(5))/2))*(x-sqrt((3-sqrt(5))/2))*(x+sq...
全部展开
x^4+x^3+x^2-1
=x^3*(x+1)+(x+1)*(x-1)=(x+1)*(x^3+x-1);
x^4-3x^2+1
=(x^2-(3+sqrt(5))/2)*(x^2-(3-sqrt(5))/2)
=(x-sqrt((3+sqrt(5))/2))*(x+sqrt((3+sqrt(5))/2))*(x-sqrt((3-sqrt(5))/2))*(x+sqrt((3-sqrt(5))/2));
x^4-7x^ ×2y^2+81y^4=??什么题目?
x^8+x^4+1=无实数解
虚数解问为=(x+((-1+sqrt(3)i)/2)^(1/4))*(x+((-1-sqrt(3)i)/2)^(1/4));
2(x^2-3ab)+x(4a-3b)=2*x^2+(2a-3b/2)x-3ab=(x-2a)(x+3b/2).
收起