Evaluate: 2m^2-(n-p) when m=3, n=-2, p=-4

Answer 1

Just substitute the assigned numbers for letters.
n - p = -2 -(-4) = -2 + 4 = 2
m^2 = 9

So, what is (2*9) - 2 ?

Answer 2

16

Answer 3

That is correct :-)
Have fun with algebra!