If $f( x ) = 3x ^ { 3} - 13x ^ { 2} + 6x - 4$ , what is $f(3)$ ?

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Answer 1 · 2018-01-18T17:55:59

$-22$

Replace all the x’s in f(x) with 3 so you can evaluate it ..

$f(x) = 3x^3-13x^2+6x-4$

$f(3) = 3(3)^3-13(3)^2+6(3)-4$

$= 3(27)-13(9)+6(3)-4$

$= 81-117+18-4$

$=-22$

If f( x ) = 3x ^ { 3} - 13x ^ { 2} + 6x - 4f( x ) = 3x ^ { 3} - 13x ^ { 2} + 6x - 4, what is f(3)f(3)?