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How do you evaluate the function $f (x) = 6 x^{2} + 2 x - 12$ $f(x)=6x^2+2x-12$ for $f (- x)$ $f(-x)$ ?

1 Answer

Jun 17, 2018

$f (- x) = 6 x^{2} - 2 x - 12$ $f(-x)=6x^2-2x-12$

Explanation:

$substitute x = - x into f (x)$ $"substitute "x=-x" into "f(x)$

$f (- x) = 6 {(- x)}^{2} + 2 (- x) - 12$ $f(color(red)(-x))=6(color(red)(-x))^2+2(color(red)(-x))-12$

$\times \times x = 6 x^{2} - 2 x - 12$ $color(white)(xxxxx)=6x^2-2x-12$

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