What is f(3) if f(x) = -5x3 + 6x2 - x - 4?

2 ⤊

What is f(3) if f(x) = -5x3 + 6x2 - x - 4?

What is f(3) if f(x) = -5x3 + 6x2 - x - 4?
a. -74
b. -88
c. 74
d. 182

2007-11-22 05:51:20 · 3 answers · asked by surf22n30skate 1 in Science & Mathematics ➔ Mathematics

3 answers

f(x) = - 5x³ + 6x² - x - 4

For f(3)

f(3) = - 5(3)³ + 6(3)² - 3 - 4

f(3) = - 5(27) + 6(9) - 3 - 4

f(3) = - 135 + 54 -3 - 4

f(3) = -88 (b)

Saludos n_n

2007-11-26 03:14:01 · answer #1 · answered by Anonymous · 0⤊ 1⤋

the answer is b -88.
F(3)=-5*3^3+6*3^2-3-4
=-135+54-3-4
=88

2007-11-22 06:38:52 · answer #2 · answered by pearls3212 4 · 1⤊ 1⤋

f(3) = (- 5 x 27) + (6 x 9) - 3 - 4
f(3) = - 135 + 54 - 7
f(3) = - 142 + 54
f(3) = - 88
ANSWER b

2007-11-26 03:21:48 · answer #3 · answered by Como 7 · 1⤊ 1⤋