Evaluate the function at the specified value f(x)= -x^3+5x^2-7x-8
A. find f(-3)
b. find f(0)
c. find f(2)
2007-11-30 07:37:49 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Question a
f ( - 3 ) = 27 + 45 + 21 - 8
f ( - 3 ) = 93 - 8
f ( - 3 ) = 85
Question b
f ( 0 ) = - 8
Question c
f ( 2 ) = - 8 + 20 - 14 - 8
f ( 2 ) = 20 - 30
f ( 2 ) = - 10
2007-12-03 03:48:34 · answer #1 · answered by Como 7 · 1⤊ 1⤋
Just rewrite the equation, replacing each x with its actual value and calculating the function value.
I've rewritten the problems for you. All you have to do are the calculations.
A: f(-3) = (-3)³+5(-3)²-7(-3)-8
B: f(0) = (0)³+5(0)²-7(0)-8
C: f(2) = (2)³+5(2)²-7(2)-8
2007-11-30 15:43:52 · answer #2 · answered by DWRead 7 · 0⤊ 0⤋
A. f(-- 3) = --(--3)^3 + 5(--3)^2 --7(--3) -- 8 = 85
b. f(0) = -- 8
c. f(2) = -- (2)^3 + 5(2^2) --7(2) -- 8 = -- 10
2007-11-30 15:45:37 · answer #3 · answered by sv 7 · 1⤊ 0⤋
f(x)= -x^3+5x^2-7x-8
f(-3)= -(-3)^3+5(-3)^2-7(-3)-8
f(-3)= -(-27)+5(9)-(-21)-8
f(-3)= 27+45+21-8
f(-3)= 85
f(0)= -(0)^3+5(0)^2-7(0)-8
f(0)= -0+0-0-8
f(0)=-8
f(2)= -(2)^3+5(2)^2-7(2)-8
f(2)= -(8)+5(4)-(14)-8
f(2)= -8+20-14-8
f(2)= -10
2007-11-30 16:00:13 · answer #4 · answered by Siva 5 · 0⤊ 1⤋
a= -11
b= -8
c= 6
2007-11-30 15:59:54 · answer #5 · answered by dany 3 · 0⤊ 1⤋
A) 85
B) -8
C) -10
2007-11-30 15:41:17 · answer #6 · answered by pstwoorbust 3 · 1⤊ 0⤋
I think its A, B, or C
2007-11-30 15:40:26 · answer #7 · answered by Anonymous · 0⤊ 0⤋
a.85
b.-8
c.-10
2007-11-30 15:46:05 · answer #8 · answered by Anonymous · 1⤊ 1⤋
a.)
2007-11-30 15:39:47 · answer #9 · answered by Anonymous · 0⤊ 0⤋