This is a tumblelog, kinda like a blog but with short-form, mixed-media posts with stuff I like. Scroll down a bit to start reading, or a bit more to read more about me.
Найдите ошибочку…
This is the only type of math I was actually good at.
a=b ↓ (a+b)(a-b)=b(a-b) (a+b)×0=b×0 (∵a-b=0) but, a+b≠b
4行目から5行目への過程で両辺をa-b=0で割ったらアカンと言うこと?