SOLUTION: f(x)= 2x + 5 and g(x)= 3x2-1 the 2 should be squared. f(b2) (b squared) g(a + 1) f(0)+9(3)

Algebra ->  Functions -> SOLUTION: f(x)= 2x + 5 and g(x)= 3x2-1 the 2 should be squared. f(b2) (b squared) g(a + 1) f(0)+9(3)      Log On


   

Question 183014: f(x)= 2x + 5 and g(x)= 3x2-1 the 2 should be squared.
f(b2) (b squared)
g(a + 1)
f(0)+9(3)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'll do the first two to get you started

# 1

f%28x%29=+2x+%2B+5+ Start with the given function.


f%28b%5E2%29=+2b%5E2+%2B+5+ Plug in x=b%5E2. In other words, replace each "x" with b%5E2

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# 2

g%28x%29=+3x%5E2-1+ Start with the given function.


g%28a%2B1%29=+3%28a%2B1%29%5E2-1+ Plug in x=a%2B1. In other words, replace each "x" with a%2B1


g%28a%2B1%29=+3%28a%5E2%2B2a%2B1%29-1+ FOIL


g%28a%2B1%29=+3a%5E2%2B6a%2B3-1+ Distribute


g%28a%2B1%29=+3a%5E2%2B6a%2B2+ Combine like terms.