Question

Expand the following using identities:
(i) (3x+4y)2
(ii) (2a-3b)2​

Answer 1

Answer:

I) By using identify (a+b)^2= a^2+b^2+2ab

= (3x)^2+(4y)^2+(2*3x*4y)

= 9x^2+16y^2+24xy