Question

Expand using suitable identities. i)(5a – 3b) 2 ii) (4a – 7b) (4a + 7b) iii) (2x +3y) (2x – 5y) ​

Answer 1

i)5a×2 -3b×2
= 10a-6b

ii)(4a-7b)(4a+7b)
=