Maths problem: how to do part (b) i and ii, thanks.?
回答 (1)
2020-01-05 7:40 pm
✔ 最佳答案
(i)65(x−y)²=17(x+y)²
65(41−2M)=17(41+2M)
65×41−17×41=17×2M+65×2M
48×41=82×2M
48×41=4M×41
M=12
(ii)
x⁴+y⁴
=(x²+y²)²−2x²y²
=41²−2M²
=1393
收錄日期: 2021-04-24 07:44:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200105105211AAvOMQJ