x²+16²=(x+2)²
x=?
ps(我要steps)
x²+16²=(x+2)²
2010-03-21 8:15 pm
回答 (5)
2010-03-21 8:27 pm
✔ 最佳答案
x²+16²=(x+2)²x²+256=(x+2)(x+2)
x²+256=x(x+2)+2(x+2)
x²+256=x²+2x+2x+4
256=4x+4
-4x=4-256
-4x=-252
x=63
參考: 自己
2010-03-21 10:59 pm
x²+16²=(x+2)²
x²+(16)(16)=(x+2)(x+2)
x²+256=x(x+2)+2(x+2)
x²+256=x²+2x+2x+4
256=4x+4
-4x=4-256
-4x=-252
4x=252
x=63
x²+(16)(16)=(x+2)(x+2)
x²+256=x(x+2)+2(x+2)
x²+256=x²+2x+2x+4
256=4x+4
-4x=4-256
-4x=-252
4x=252
x=63
2010-03-21 10:11 pm
x²+16²=x²+4X+4
16²=4X+4
256-4=4X
4X=252
X=63
搞定啦!
16²=4X+4
256-4=4X
4X=252
X=63
搞定啦!
2010-03-21 8:25 pm
x²+16²=(x+2)²
16² = (x+2)² - x²
256 = (x+2 - x)(x+2 + x)
256 = 2(2x+2)
256 = 2 * 2(x+1)
64 = x + 1
x = 63
16² = (x+2)² - x²
256 = (x+2 - x)(x+2 + x)
256 = 2(2x+2)
256 = 2 * 2(x+1)
64 = x + 1
x = 63
2010-03-21 8:23 pm
x²+16²=x²+4X+4
16²=4X+4
256-4=4X
252=4X
X=63
16²=4X+4
256-4=4X
252=4X
X=63
收錄日期: 2021-04-13 17:10:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100321000051KK00572