Question

if f(x)=x2-5x+1 evaluate f(2)-f(-1)

Answer 1

-12
this is your answer

Answer 2

Answer:

f(2) - f(-1) = -12

Step-by-step explanation:

f(x) = x^{2} -5x+1

f(2) = 2^{2} - 5 (2) +1

      = 4 -10 +1

      = 5-10

      = -5

f(-1) = (-1)^{2} - 5 (-1) +1

      = 1 +5 +1

      = 7

f(2) - f(-1) = (-5) - 7 = -12