Let x=3 Evaluate if possible: -2x^2
of coutrse it's possible. Just plug in 3 for x:
-2(3^2) = -2(9) = -18
-2(9) = -18
To evaluate -2x^2 when x = 3, you need to substitute 3 for x in the expression -2x^2. Let me break it down step by step to show you how to calculate it:
1. Replace x with the value 3 in the expression: -2(3)^2
2. Simplify the exponent: -2(9)
3. Multiply: -18
Therefore, when x = 3, the value of -2x^2 is -18.