Can you explain how to do this sum with all the steps - Maths - Algebraic Expressions and Identities

Question

Can you explain how to do this sum with all the steps

Josepaul Paulachan · Accepted Answer

Dear Student2a-12 2a-12 ⇒2a2a-12  -122a-12 = 4a2 -(2a×12) -(12×2a) +(12×12)= 4a2 -a-a+14= 4a2-2a+14 2a-12 2a-12   = 4a2-2a+14 Regards