Question

Jika f(x)=x²+2x-1,nilai dari f(-2)+f(5) adalah

Answer 1

F(x) = x² + 2x - 1

f(-2) = -2² + 2(-2) - 1
       = 4 - 4 - 1
       = - 1
f(5) = 5² + 2(5) - 1
      = 25 + 10 - 1
      = 34

jadi f(-2) + f(5) :
-1 = 34 = 33

semoga membantu. 

Answer 2

F(-2) = 4-4-1
=0-1
=-1
F(5) = 25+10-1
= 34
-1+34= 33