Question

hii everyone.....
evaluate each of the following using identities....
please tell me fast by step by step .....its urgent......​

Answer 1

Answer

(o) 3x+21x+28 ...

Answer 2

Answer:

$a \ - \: \: \: \: 3x {}^{2} + 12x - 21 x - 28$

$3 {x}^{2} - 9x - 28$