Question

сократите дробь a2+ac+b2-2ab-bc/ab+2bc-ac-b2-c2

Answer 1

$frac{ a^{2}+ac + b^{2} -2ab - bc }{ab + 2bc - ac- b^{2}- c^{2} } = frac{( a^{2} - 2ab + b^{2}) + ac - bc }{ab - ac - ( b^{2}- 2bc + c^{2}) } = frac{(a-b) ^{2}+c(a-b) }{a(b-c)- (b-c) ^{2} } = frac{(a-b)(a-b+c)}{(b-c)(a-b+c)} =$$frac{a-b}{b-c}$