你见过男生骂人吗:谁会解方程?

来源:百度文库 编辑:中科新闻网 时间:2024/05/12 10:32:26
(x+5)*(x+5)-x*x=225

x^2+10x+25-x^2=225
10x=200
x=20

(x+5)*(x+5)-x*x=225
x*x+10x+25-x*x=225
10x=200
x=20

X*X+10X+25-X*X=225
10X+25=225
X=20

解:
X^2+10X+25-X^2=225
10X=200
X=20
(x+5)*(x+5)=(x+5)^2=X^2+10X+25