SOLUTION: I'm confused on this one as well. If q(x) = 5x^2+4, find each value 10) 5[q(2a)]

Algebra ->  Rational-functions -> SOLUTION: I'm confused on this one as well. If q(x) = 5x^2+4, find each value 10) 5[q(2a)]       Log On


   

Question 184350: I'm confused on this one as well.
If q(x) = 5x^2+4, find each value
10) 5[q(2a)]
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
q%28x%29=+5x%5E2%2B4 Start with the given function.


q%282a%29=+5%282a%29%5E2%2B4 Plug in x=2a


q%282a%29=+5%284a%5E2%29%2B4 Square 2a to get 4a%5E2


q%282a%29=+20a%5E2%2B4 Multiply


5%28q%282a%29%29=+5%2820a%5E2%2B4%29 Multiply both sides by 5


5%28q%282a%29%29=+5%2820a%5E2%29%2B5%284%29 Distribute


5%28q%282a%29%29=+100a%5E2%2B20 Multiply