Question

Sendo f(x)=2x²+x-4 ,
determine o valor de f(4) + f(-2)

Answer 1

f(x)=2x²+x-4 ,
determine o valor de f(4) + f(-2) = 32 + 2 = 34

f(4) = 2(4)²+ 4 - 4 = 2.16 = 32 
f(-2)= 2(-2)²+ (-2) - 4 = 8 - 2 - 4 ==> 2

Answer 2

f(x)=2x²+x-4
- f(4) = 2(4)² + 4 - 4 = 2.16 = 32
- f(-2) = 2(-2)² - 2 - 4 = 8 - 6 = 2
- f(4) + f(-2) => 32 + 2 = 34