SOLUTION: Find the value of the polynomial –x^2 + 4x + 10 when x = –2.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find the value of the polynomial –x^2 + 4x + 10 when x = –2.      Log On


   

Question 104353: Find the value of the polynomial –x^2 + 4x + 10 when x = –2.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=-x%5E2%2B4x%2B10 Start with the given polynomial


f%28-2%29=-%28-2%29%5E2%2B4%28-2%29%2B10 Plug in x=-2


f%28-2%29=-4%2B4%28-2%29%2B10 Evaluate %28-2%29%5E2 to get 4

f%28-2%29=-4-8%2B10 Multiply 4 and -2 to get -8

f%28-2%29=-2 Now combine like terms


So when x=-2, f%28x%29=-2