Given f, of, x, equals, 3, x, squared, minus, 4, x, minus, 8f(x)=3x
2
−4x−8, find f, of, minus, 7f(−7)
To find f(-7), we substitute x = -7 into the given expression for f(x):
f(-7) = 3(-7)^2 - 4(-7) - 8
= 3(49) + 28 - 8
= 147 + 28 - 8
= 167 - 8
= 159
Therefore, f(-7) = 159.
wrong
I apologize for the mistake. Let's calculate f(-7) correctly this time.
f(x) = 3x^2 - 4x - 8
To find f(-7), we substitute x = -7 into the expression for f(x):
f(-7) = 3(-7)^2 - 4(-7) - 8
= 3(49) + 28 - 8
= 147 - 28 - 8
= 119 - 8
= 111
Therefore, f(-7) = 111.
Now, to find f(-7) - 7:
f(-7) - 7 = 111 - 7
= 104
Therefore, f(-7) - 7 = 104.