Question

I would really appreciate if someone can help me out with these questions..
And it's ok if you can't answer all of them just answer the a) only because I am getting confused on how to do this​

Answer 1

Step-by-step explanation:

Assume a is 5 and b is 3.

x ^ 2 = 25

y ^ 2 = 9

x ^ 2 + y ^ 2 - 2xy = 25 + 9 - 2 × 5×3 = 4

So the answer is a ^ 2 + b ^ 2 - 2xy