①4x^2-256=0 ②x^2-6x-10=9 ③-5x^2=4x-1
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①4x^2-256=0 ②x^2-6x-10=9 ③-5x^2=4x-1
①4x^2-256=0 ②x^2-6x-10=9 ③-5x^2=4x-1
①4x^2-256=0 ②x^2-6x-10=9 ③-5x^2=4x-1
1.x^2=64 x=8
2.x^2-6x-1=0 x=3或-2
3.-5x^2-4x+1=0 x=-1或x=1/5
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
如果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,
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5(x的2次方+X-3)-4x(6+x)+x(-x+4)=0
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
解几个方程,①x(x+1)(x+2)(x+3)=3 ②x^4+8x^3+14x^+8x+1=0 ③x(x+1)(x^2-2x-4)=0
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x/x-2)+(2/x*2+2x)-(x+6/x*2-4)化简,=x^2/x(x-2)+(2x-4)/x(x^2-4)-(x^2+6x)/x(x^2-4)=x^2/x(x-2)-(x+2)/x(x-2)=(x-2)(x+1)/x(x-2)=(x+1)/x
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
2x+3x+4x+5x+x+6x+7x=100
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
1.用公式计算:COSX=1-X*X/2!X*X*X*X/4!-X*X*X*X*X*X/6!.直到最后一项的绝对
①4x^2-256=0 ②x^2-6x-10=9 ③-5x^2=4x-1
用(公式法)解方程:x²+x-2=0 x²-4x+2=0 4x²-3x-5=x-2 3x(x-3)=2(x-1)(x+1),①x²+x-2=0 ②x²-4x+2=0③4x²-3x-5=x-2④3x(x-3)=2(x-1)(x+1)
1.用配方法解下列方程 ①x-4x+1=0 ②x-x-2=0 ③x-11.用配方法解下列方程①x-4x+1=0 ②x-x-2=0③x-10x+21=0 ④6x-x-12=02.如果2x-10与5x+2的值相等,求x的值.3.用公式法解方程:x+x-1=0
已知函数①f(x)=-x^2+2x(x>0) ②f(x)=0(x=0) ③f(x)=x^2+mx(x