Question

(iii) (2a + 3b)(2a - 3b) = 4a2-9b2​

Answer 1

Step-by-step explanation:

2a+2a+3b-3b=4a,^2-9b^2

4a^2=4a^3-9b^2

it is not equal

hope it helps you

Answer 2

(2a+3b)(2a−3b)(4a 2+9b 2 )

=(4a 2−9b 2 )(4a 2 +9b 2)

(∵(a+b)(a−b)=a 2−b 2)

=16a4−81b4 .

Hope it helps