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Find value of...

Question

Find value of $12 x^{3} + x^{2} + x$ if $x = 7$

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Solution

Given: $12 x^{3} + x^{2} + x$

At $x = 7$ ,

$= 12 (7)^{3} + (7)^{2} + 7$

$= 12 \times 343 + 49 + 7$

$= 4116 + 49 + 7 = 4172$

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