Question

if a = 3 and b = -1 then 2a^2 -2ab+b^2

Answer 1

First you would rewrite it, Replacing the letters with the given numbers: 2(3)^2 -2(3)(-1)+(-1)^2

Answer 2

The answer is 25.
Reason: Plug in the answer in the variables a and b. Solve like a regular order of operations.
Hope this helps!!