Question

Find Using Suitable identity
(3+m)(3+m)
(5a-7b)(5a-7b)

Answer 1

Step-by-step explanation:

using (a+b)(a+b)=a

2

+b

2

+2ab

For the above expression, keeping a=5a and b=3b, we get

(5a−3b)(5a−3b)=(25a

2

+9b

2

−30ab)