Given the polynomial f(x)=3x^3-2x^2-8x-13, find f(5)?

Question

Given the polynomial F(x) = x3 + 4x2 - 15x + 19, find F(-6).

Given the polynomial F(x) = 7x2 + 13x - 50, find F(0).

Answer 1

F(x) = 3x³ - 2x² - 8x - 13

F(5) = 3(5)³ - 2(5)² - 8(5) - 13

F(5) = 3(125) - 2(25) - 8(5) - 13

F(5) = 375 - 50 - 40 - 13

F(5) = 325 - 53

F(5) = 272





F(x) = x³ + 4x² - 15x + 19

F(-6) = (-6)³ + 4(-6)² - 15(-6) + 19

F(-6) = (-6)³ + 4(36) - 15(-6) + 19

F(-6) = -216 + 144 + 90 + 19

F(-6) = -72 + 109

F(-6) = 37





F(x) = 7x² + 13x - 50

F(0) = 7(0)² + 13(0) - 50

F(0) = 0 + 0 - 50

F(0) = -50





F(x) = x⁵⁶ - 5x² + 4

F(1) = 1⁵⁶ - 5(1)² + 4

F(1) = 1 - 5 + 4

F(1) = -4 + 4

F(1) = 0

Answer 2

Given the polynomial f(x)=3x^3-2x^2-8x-13, find f(5)?



3*5^3 - 2*5^2 - 8*5 -13

3*125 - 2*25 - 40 - 13

375 - 50 - 53

272



Given the polynomial F(x) = x3 + 4x2 - 15x + 19, find F(-6).



-6^3 + 4*(-6)^2 - 15*(-6) + 19

-216 + 4*36 + 90 + 19

-216 + 144 + 109

37



Given the polynomial F(x) = 7x2 + 13x - 50, find F(0).



All x terms are zero, leaving only -50

Answer 3

1)

f(x) = 3x^3 - 2x^2 - 8x - 13

f(5) = 3(5)^3 - 2(5)^2 - 8(5) - 13

f(5) = 3(125) - 2(25) - 40 - 13

f(5) = 375 - 50 - 40 - 13

f(5) = 272



2)

f(x) = x^3 + 4x^2 - 15x + 19

f(-6) = (-6)^3 + 4(-6)^2 - 15(-6) + 19

f(-6) = -216 + 4(36) + 80 + 19

f(-6) = -216 + 144 + 89

f(-6) = 17



3)

f(x) = 7x^2 + 13x - 50

f(0) = 7(0)^2 + 13(0) - 50

f(0) = 7(0) + 13(0) - 50

f(0) = -50



4)

f(x) = x^56 - 5x^2 + 4

f(1) = 1^56 - 5(1)^2 + 4

f(1) = 1 - 5 + 4

f(1) = 0

Answer 4

All you have to do is put what's in the F( ) for x in each polynomial. In this case you have to use 5 instead of x in the first question.

For the second question you should use -6.

For the third one you should use 0.

For the last one you should use 1.



Come on! You can solve this! Do your own homework!!

Answer 5

f(1)=0

Answer 6

f(x) = 3x³ - 2x² - 8x - 13

f(5) = 3(5)³ - 2(5)² - 8(5) - 13

f(5) = 375 - 50 - 40 - 13

f(5) = 272

----------------------------------

f(x) = x³ + 4x² - 15x + 19

f(-6) = (-6)³ + 4(-6)² - 15(-6) + 19

f(-6) = -216 + 144 + 90 + 19

f(-6) = 37

------------------------------------------------

f(x) = 7x² + 13x - 50

f(0) = 7(0)² + 13(0) - 50

f(0) = -50

------------------------------------------------

f(x) = x⁵⁶ - 5x² + 4

f(1) = 1⁵⁶ -5(1)² + 4

f(1) = 1 - 5 + 4

f(1) = 0

Answer 7

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