Answer:
- 5, 3 and 10
Step-by-step explanation:
(a)
substitute x = 2 into f(x)
f(2) = 2² - 2(2) - 5 = 4 - 4 - 5 = 0 - 5 = - 5
(b)
substitute x = 4 into f(x)
f(4) = 4² - 2(4) - 5 = 16 - 8 - 5 = 8 - 5 = 3
(c)
substitute x = - 3 into f(x)
f(- 3) = (- 3)² - 2(- 3) - 5 = 9 + 6 - 5 = 15 - 5 = 10
Answer:
a -5
b) 3
c) 10
Step-by-step explanation:
[tex]f(x) = x^2 - 2x - 5\\\\a) \;f(2) = (-2)^2-2(2) -5\\= 4 - 4 - 5 = -5\\\\[/tex]
[tex]b) f(4) = 4^2 - 2(4) - 5 = 16 - 8 - 5 = 16 -13 =3[/tex]
[tex]c) f(-3) = (-3)^2 - 2(-3) - 5 = 9 + 6 - 5 = 15-5 = 10 \\\mathrm {because\; (-2(-3) \;becomes\; +6}[/tex]
