Question

If f(x)=2x3-13x2+17x+13 find:
1)f(2)
2)(-3)
3)f(0)​

Answer 1

$f(x) = 2x {}^{3} - 13x {}^{2} + 17x + 13$

When x = 2

$= 2(2) {}^{3} - 13(2) {}^{2} + 17(2) + 13$

$= 2(8) - 13(4) + 34 + 13$

$= 16 - 52 + 34 + 13$

$= 11$

When x = ( - 3 )

$2( - 3) {}^{3} - 13( - 3) {}^{2} + 17( - 3) + 13$

$= 2( - 27) - 13(9) - 51 + 13$

$= - 54 - 117 - 51 + 13$

$= - 209$

When x = 0

$= 2(0) {}^{ {}^{3} } - 13(0) {}^{2} + 17(0) + 13$

$= 0 - 0 + 0 + 13$

$= 13$

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