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Question
Which expression has a value of 18 when x = 3?
Options
\[x^2+6\]
\[2x^{2}\]
\[\text{2x+10}\]
\[(2x)^2\]
MCQ
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Solution
\[(2x)^2\]
Explanation:
Substitute x = 3:
\[2x^2=2(3^2)=2\times9=18\]
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