搜搜考试网.(X-2)^2-10(X-2)+25=0
来源：学生作业帮 编辑：搜搜考试网作业帮 分类：数学作业 时间：2024/07/28 09:49:03
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
.(X-2)^2-10(X-2)+25=0
主要就是考这个:
(a-b)^2 = a^2 -2*a*b + b^2
同类还有一个公式:
(a+b)^2 = a^2 +2*a*b + b^2
不过 n^2 = 0 则 n=0 也是一个知识点.
若设a=X-2,b=5,可得到:a^2-2*a*b+b^2=0
即 (a-b)^2 = 0
a - b = 0
X-2 - 5 = 0
X = 7
展开原式也不难：
x^2-4x+4 - 10x+20 + 25=0
x^2 - 14x - 49 =0
(x-7)^2=0
x-7=0
x=7
(a-b)^2 = a^2 -2*a*b + b^2
同类还有一个公式:
(a+b)^2 = a^2 +2*a*b + b^2
不过 n^2 = 0 则 n=0 也是一个知识点.
若设a=X-2,b=5,可得到:a^2-2*a*b+b^2=0
即 (a-b)^2 = 0
a - b = 0
X-2 - 5 = 0
X = 7
展开原式也不难：
x^2-4x+4 - 10x+20 + 25=0
x^2 - 14x - 49 =0
(x-7)^2=0
x-7=0
x=7
解方程：（2x+5)(4x*x-10x+25)=8x(x*x+1)
f(x)=｛x^2+x(x≤0),-x^2+x(x＞0)
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
解方程：x^4+2x^3-18x^2-10x+25=0
1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=0
（2x-2）(x-1)=0 x(x-5)=5x-10
已知x>0,则函数f(x)=(2x^2+7x+10)/x
解方程 144x平方-9=0 2x平方+3x+1=0 x平方-7x+1=0 25-10x+x平方=5-x 4x平方-4x
x+2x×10=10x+2x+36