根号7等于正于根号5加3倍根号2的和乘以X 求X
问题描述:
根号7等于正于根号5加3倍根号2的和乘以X 求X
答
√7=(±√5+3√2)x
x1=√7/(√5+3√2)=-√7(√5-3√2)/13=(3√14-√35)/13
x2=√7/(-√5+3√2)=√7(3√2+√5)/13=(3√14√+√35)/13