Question

f(x) = x4 - 9x3 - 8x2 - 9x - 2; f(-3)
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Answer 1

Answer:

Step-by-step explanation:

f(x) = x⁴ - 9x³ - 8x² - 9x - 2

f(-3) = (-3)⁴ -9*(-3)³ - 8*(-3)² - 9*(-3) - 2

       = 81 - 9*(-27) - 8*9  + 27 -2

       = 81 + 243 - 72 + 27 - 2

      = 277

Answer 2

Answer:

$F(-3)=142$

Substitute x=-3 into

$F(x)=x\times4-9x\times3-8x\times2-9x-2$

Substitute

$F(-3)=-3\times4-9\times(-3)\times3-8\times(-3)\times2-9\times(-3)-2$

Determine the sign

$F\left(-3\right)=-3\times4+9\times3\times3+8\times3\times2+9\times3-2$

Calculate the product or quotient

$F(-3)=-12+9\times3\times3+8\times3\times2+9\times3-2$

$F\left(-3\right)=-12+27\times3+8\times3\times2+9\times3-2$

$F\left(-3\right)=-12+81+8\times3\times2+9\times3-2$

$F\left(-3\right)=-12+81+24\times2+9\times3-2$

$F\left(-3\right)=-12+81+48+9\times3-2$

$F\left(-3\right)=-12+81+48+27-2$

Calculate the sum or difference

$F(-3)=69+48+27-2$

$F(-3)=117+27-2\\F(-3)=144-2\\F(-3)=142$

I hope this helps you

:)