how do you prove (a+b)^2=a^2+2ab+b^2 algebraically This question has not been answered yet! Don't worry! You can check out similar questions with solutions below Prove that a? + b? = (a+b)? - 2abprove that a^2+b^2+2ab=sin^2A is possible inly when a=bProve that (a^2+b^2)/2ab=sin^2A is possible only when a =b ... distributive law to prove that (a + b)2 = a2 + 2ab + b2 ? ... an interior point of a square ABCD. Prove that PA+PB+PC+PD ...