SOLUTION: We have the answer to this problem, but we are unsure of how it was solved. Obviously we got a different answer….please help! xº + 2x¹ if x=20

Algebra ->  Exponents -> SOLUTION: We have the answer to this problem, but we are unsure of how it was solved. Obviously we got a different answer….please help! xº + 2x¹ if x=20       Log On


   

Question 163882: We have the answer to this problem, but we are unsure of how it was solved. Obviously we got a different answer….please help!
xº + 2x¹ if x=20
Found 2 solutions by jim_thompson5910, Fombitz:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E0%2B2x%5E1 Start with the given expression


%2820%29%5E0%2B2%2820%29%5E1 Plug in x=20


1%2B2%2820%29%5E1 Raise 20 to the zeroth power to get 1. Note: any number (except zero) to the zeroth power is ALWAYS equal to 1. In other words, x%5E0=1 where x%3C%3E0


1%2B2%2820%29 Raise 20 to the first power to get 20. Note: x%5E1=x for all x


1%2B40 Multiply


41 Add


So x%5E0%2B2x%5E1=41 when x=20

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E0=1 independent of what x is.
x%5E1=x
x%5E0%2B2x%5E1=1%2B2x
1%2B2x=1%2B2%2820%29=1%2B40=41