Question 132814
Evaluate (-2x)^2 and -2x^2 when x = 3.

If x = 3, then replace x with 3 and simplify.

(-2(3))^2 = (-6)^2 = 36

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For the next question, notice that there is no parentheses.  This means that only the x value is squared and then the product is multiplied by -2.

-2(3)^2 = -2(9) = -18

Is this clear?