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How do you use synthetic substitution to find f(3) and f(-4) for $f (x) = x^{4} - 8 x - 11$ $f(x)= x^4-8x-11$ ?

1 Answer

Sep 12, 2015

f(3)= 46

f(-4)= 277

Explanation:

f(3)= $3^{4} - 8 \cdot 3 - 11 = 81 - 24 - 11 = 46$ $3^4 -8*3-11= 81-24-11=46$

f(-4)= ${(- 4)}^{4} - 8 (- 4) - 11 = 256 + 32 - 11 = 277$ $(-4)^4 - 8(-4)-11= 256+32-11=277$

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