alleryFind the value of 3x^2 when x = 2.
A36
B10
C12
D16
Answer & Solution
Correct answer: C. 12
1. The power applies only to x, so x^2 = 4.
2. Then 3 × 4 = 12.
3. 36 wrongly squares the 3x together, giving (3 × 2)^2.
_Source: Wikipedia, Elementary algebra, Algebraic notation_
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