If f(x) = x square - 4x + 6, find f(1) - f(-1)
Mathematics · Middle School · Thu Feb 04 2021
Answered on
Given the function:
f(x) = x^2 - 4x + 6
Find f(1) - f(-1)
Solution:
Solve first for f(1) and f(-1) separately. To do substitute 1 or -1 to the value of x of the function f(x).
f(1) = ( 1 )^2 - 4(1) + 6
f(1) = 1 - 4 + 6
f(1) = -3 + 6
f(1) = 3
f(-1) = ( -1 )^2 - 4(-1) + 6
f(-1) = 1 + 4 + 6
f(-1) = 11
Equate the two values in the equation f(1) - f(-1).
f(1) - f(-1) = 3 - 11
f(1) - f(-1) = 8
Final answer:
f(1) - f(-1) = 8