SOLUTION: Substitute 0 for y in the rule for f(x) and solve for x F(x)=-4x-8

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Question 925919: Substitute 0 for y in the rule for f(x) and solve for x
F(x)=-4x-8
Found 2 solutions by TimothyLamb, MathLover1:
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
F(x) = -4x - 8
F(x) = -4x - 8 = 0
-4x = 8
x = 8/-4
x = -2
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Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

Substitute 0 for y in the rule for f%28x%29 and solve for x:

f%28x%29=-4x-8........f%28x%29=y=0
0=-4x-8
0%2B4x=-4x%2B4x-8
4x=-8
x=-8%2F4
x=-2