If $f (x) = 3 x^{2} - x$ $f(x) = 3x^2 - x$ , how do you find f(-2)?

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If $f (x) = 3 x^{2} - x$ $f(x) = 3x^2 - x$ , how do you find f(-2)?

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Answer 1 · 2018-04-10T21:38:48

$f (- 2) = 14$ $f(-2)=14$

Explanation:

$substitute x = - 2 into f (x)$ $"substitute " x = - 2" into "f(x)$

$f (- 2) = (3 \times {(- 2)}^{2}) - (- 2)$ $f(color(red)(-2))=(3xxcolor(red)((-2)^2))-(color(red)(-2))$

$\times \times = (3 \times 4) + 2 = 12 + 2 = 14$ $color(white)(xxxx)=(3xx4)+2=12+2=14$

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If $f (x) = 3 x^{2} - x$ $f(x) = 3x^2 - x$ , how do you find f(-2)?

1 Answer

Explanation:

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If f(x)=3x2−xf(x) = 3x^2 - x, how do you find f(-2)?

1 Answer

Explanation:

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If $f (x) = 3 x^{2} - x$ $f(x) = 3x^2 - x$ , how do you find f(-2)?