Question

find the product of the following using identity
(a + b)2= a2+2ab + b2 .

(a) (3x+9)2​

Answer 1

Answer:

9x+54x+81

Step-by-step explanation:

i hope it's useful

Answer 2

Step-by-step explanation:

Using identity a2+2ab + b2

(3x+9)2= 3x^2 + 2(3x)(9) + 9^2

= 9x^2 +54x + 81

Using the identity again 9x^2 +54x + 81

= 3x^2 + 9^2 + 2(3x)(9)

= (3x+9) (3x+9)