Question

expand (3a+4) (3a+5) using suitable identity​

Answer 1

Answer:

using (x+a) and (x+b)= xsquare +(a+b)x+ab

Answer 2

Answer:

(3a+4) (3a+5)

= (3a)^2 + (4+5)x + 4×5

= 9a^2 + 9x + 20

Using the formula-

(x+a)(x+b)= x^2 + (a+b)x + ab

HOPE IT HELPS YOU