Question 90076
f(t) = 2t^2 - 4t - 1, find
 
f(2)
then find f(-1)
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Substitute 2 in place of "t" to get:

f(2) = 2(2^2) - 4*2 -1
f(2) = 8 -8 -1
f(2) = 1
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Substitute -1 in place of "t" to get:
f(-1) = 2(-1)^2 -4*-1 -1
f(-1) = 2*1 +4 -1
f(-1) = 2 + 4 -1
f(-1) = 5
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Cheers,
stan H>