琬婷
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 20:58:53
已知x²-5x=14,求(x-1)(2x-1)-(x+1)²+1的值
已知x²-5x-14=0 求(x-1)(2x-1)-(x-1)²+1
已知x²-5x=14,求(x-1)(2x-1)-(x+1)²+1的值
设集合A={x-2,2x²+5x,12},已知-3∈A,求实数x的值?已知x∈{1,2,x²},则x=__?
(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2) 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二
x²-2x-3分之16-x²÷x-3分之x²-5x+4
已知n为正整数,且x^3n=2,求(2x^3n)²+(-3x^2n)³的值.3n和2n都是指数
若x^2n=2,求(-3x^3n)²-4(-x²)^2n的值.
求解(x³+6x²+x)÷2x=?
以知x³+2x²=x-1,求式子3x³+6x²-3x+2的值
①x²-6x-3=0 ②﹙x+1﹚²=﹙2x-1﹚²
5xy²-{2x²y-[3xy²-(xy²-2x²y)]÷(-1/2xy)最后那个是“负二分之一xy”. 求化简值.要完整的过程。
5xy²-{2x²y-[3xy²-(4xy²-2xy²)]} 其中x=2,y=-1
3xy(x²-1)-2x²(1/2xy+y/x)
4x²--2xy+4y²=4(x+y)²-10xy这里的10xy怎么来的呢?
5x²+5xy/x²-y²·(4x-4y)计算
5x²+5xy/x²-y²·(4x-4y)计算!急
计算:(3x²-5xy-2y²)/(3x+y)
计算-4x(3x²-2x-1)
3x²-1=4x
(4x²-9分之4x+1)·(﹣3x²)
(3x+1)²-(4x+13)²=0
计算(1)3x/8y×16y²/27x² (2)(2xy-x²)÷x-2y/xy 2x-6/x²-4x+4×2x-4/x-3
x²-xy-6y²-2x+11y-3;2x²-xy-6y²+3x+8y-2; 3x²+10xy-8y²-11x+26y-20;
x²-xy-6y²-2x+11y-3; 2x²-xy-6y²+3x+8y-2; 3x²+10xy-8y²-11x+26y-20; 要过
xy(x+y)²-4x³y³ 怎么分解因式?
⑴2ab²·(-3ab),⑵4x²y·﹙-xy²﹚³,⑶﹙1.3×10的五次方﹚×﹙3.8×10³﹚分别等于多少
已知4x-4x²y-xy²+y³=0,求(x²+y²)/xy
分解因式 4x³y+4x²y²+xy³
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
已知x+y=4,xy=2,求2x³y+4x²y²+2xy³的值
1/4x²-xy+y²(因式分解)