If the value of $x$ is $4$ find the value of $x^{4} + 3 x^{2} - 6$

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Solution

Given $x^{4} + 3 x^{2} - 6$

Put $x = 4$

$\Rightarrow$ $4^{4} + 34^{2} - 6$

$\Rightarrow$ $256 + 48 - 6 = 298$

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x = tan (22.5)^{\circ},

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