Question

Hi can i know the proof of (a+b)(a- b)=a 2- b 2?

Answer 1

Multiply it and u can get the answer

Answer 2

(a+b)(a-b).......... Multiply the both....... a*a - b*b ( - sign is there because multiplication of - and + is - )......... So, a*a - b*b= a^2-b^2........... So, (a+b)(a-b) = a^2-b^2...... Hence proved...