a(a-b)=b(b+a)
ab=b(b+b)
a=?
b=?
a(a-b)=b(b+a)
=>aa-ab=bb+ab
ab=b(b+b)
=>a=b+b
=>a=2b
aa-ab=bb+ab
4bb-2bb=bb+2bb
=>4-2=1+2
This is wrong , but can you to make that right(Hint : you can try the zero)
If no,say!
更新1:
a don't = b
更新2:
good
