(1)6x^2-7x+1=0 (2)5x^2-9x-18=0 (3)4x^2-3x=52 (4)5x^2=4-2x
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/30 19:52:14
(1)6x^2-7x+1=0 (2)5x^2-9x-18=0 (3)4x^2-3x=52 (4)5x^2=4-2x
![(1)6x^2-7x+1=0 (2)5x^2-9x-18=0 (3)4x^2-3x=52 (4)5x^2=4-2x](/uploads/image/z/6165452-20-2.jpg?t=%281%296x%5E2-7x%2B1%3D0+%282%295x%5E2-9x-18%3D0+%283%294x%5E2-3x%3D52+%284%295x%5E2%3D4-2x)
(1)6x^2-7x+1=0
(6X-1)(X-1)=0 则X=1或1/6
(2)5x^2-9x-18=0
(5X+6)*(X-3)=0 则X=-6/5或3
3)4x^2-3x=52 4X^2-3X-52=0
(X-4)(X+13)=0 X=4或-13
5X^2+2X-4=0
5(X+1/5)^2-4-5*(1/5)^2=0
5(X+1/5)^2=21/5
(X+1/5)^2=21/25
X1=根号(21)/25-1/5
X2=-根号(21)/25-1/5
(6X-1)(X-1)=0 则X=1或1/6
(2)5x^2-9x-18=0
(5X+6)*(X-3)=0 则X=-6/5或3
3)4x^2-3x=52 4X^2-3X-52=0
(X-4)(X+13)=0 X=4或-13
5X^2+2X-4=0
5(X+1/5)^2-4-5*(1/5)^2=0
5(X+1/5)^2=21/5
(X+1/5)^2=21/25
X1=根号(21)/25-1/5
X2=-根号(21)/25-1/5
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
方程(x+1)(x+2)(x+3)(x+4)(x+5)(x+6)(x+7)(x^2+8x+9)+64=0
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1x+2x+3x+4x+5x+6x+7x…+99x=100