Question

evaluate. (x)2 - 3x, for x = -5

Answer 1

-10 - -15 = 5
-10 + 15 = 5
subtracting a negative number means adding it

Answer 2

If x = -5, then substitute -5 for all x's appearing in the statement.
So (x)2 - 3x translates to (-5)*2 - 3*(-5) = (-10) - (-15) = (-10) + 15 = 5.

Answer 3

thank i understand now