EmpyrealBlue EmpyrealBlue

02-09-2016
Mathematics

contestada

Evaluate f(x) = -2x² -4 for x=3

A. -10
B. 10
C. -18
D. -22

Respuesta :

Willchemistry Willchemistry

02-09-2016

f(x) = - 2 x² - 4 for x = 3

f(3) = - 2*3² - 4

f(3) = -2*9 - 4

f(3) = -18 -4

f(3) = -22

Answer D

hope this helps!

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SyntaxError SyntaxError

02-09-2016

[tex]f(x) = -2x^2-4 \\ f(x) = -2(3)^2-4 [tex][plug in 3 into your x value][tex]\\ f(x)=-18-4[tex] [3 squared equals 9. Now multiply 9*(-2) = -18[tex]\\ f(x)=-22 [ -18-4][/tex]

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