Question

(13)
(31)
is. Using the identity (a + b)2 = (a + 2ab + b), evaluate the following.
11122
il: 3082
lii. 530
6. Using the identity (a - b) = (c? - 2ab + b ), evaluate the following.
2932
ii. 6992
ili. 1912
17. Find the squares of the following numbers containing 5 in units place.
1 45²
ii. 652
ii. 752
18. Evaluate using the identity (a + b)(a - b) = a - b?
1. 49 x 51
ii. 68 x 72​

Answer 1

I'm sorry it's too long

thanks