a-b=c olsun
(a-b)(a-b) = (a-b).c
a^2-2ab+b^2 = ac-bc
a^2-2ab-ac = -b^2-bc
a^2-ab-ac = ab-b^2-bc
a(a-b-c) = b(a-b-c)
a=b
(u: !)
(a-b)(a-b) = (a-b).c
a^2-2ab+b^2 = ac-bc
a^2-2ab-ac = -b^2-bc
a^2-ab-ac = ab-b^2-bc
a(a-b-c) = b(a-b-c)
a=b
(u: !)