SOLUTION: f(x)= 3x(2x-1). f(-1)=

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Question 48112This question is from textbook finite mathematics
: f(x)= 3x(2x-1). f(-1)= This question is from textbook finite mathematics

Answer by tutorcecilia(2152) About Me  (Show Source):
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f(x)= 3x(2x-1)
f(-1)= 3(-1)(2(-1))-1)
f(-1)= -3(-2-1)
f(-1)= -3(-3)
f(-1)= 9
.
Check by plugging in y = 9 and x = -1
y=3x(2x-1)
9=3(-1)(2(-1)-1)
9=-3(2(-1)-1)
9=-3(-2-1)
9=(-3)(-3)
9=9