SOLUTION: Use the function f(x) = 3 – x^2 to find a. f(-2) b. f( 2/3 ) c. f(a + 2)

Algebra ->  Average -> SOLUTION: Use the function f(x) = 3 – x^2 to find a. f(-2) b. f( 2/3 ) c. f(a + 2)       Log On


   

Question 1113543: Use the function f(x) = 3 – x^2 to find
a. f(-2) b. f( 2/3 ) c. f(a + 2)
Found 2 solutions by josgarithmetic, ankor@dixie-net.com:
Answer by josgarithmetic(39800) About Me  (Show Source):
You can put this solution on YOUR website!
All you do is substitute and compute. (or simplify)

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
the function f(x) = 3 – x^2 to find
a. f(-2)
f(-2) = 3 - (-2^2)
f(-2) = 3 - 4
f(-2) = -1
:
b. f( 2/3 )
f%282%2F3%29+=+-3+-%28%282%2F3%29%5E2%29
f%282%2F3%29+=+-3+-+4%2F9%29
f%282%2F3%29+=+-3%284%2F9%29
:
c. f(a + 2)
f%28a%2B2%29+=+-3+-+%28a%2B2%29%5E2
FOIL(a+2)(a+2)
f%28a%2B2%29+=+-3+-+%28a%5E2%2B4a%2B4%29
f%28a%2B2%29+=+-3+-+a%5E2-4a-4
f%28a%2B2%29+=+-a%5E2+-+4a++-+7