SOLUTION: please help me solve g(-10) if g(x)=70

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Question 72617: please help me solve g(-10)
if
g(x)=70

Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
You are given that:
.
g(x) = 70
.
Then to find g(-10), all you need to do is to go to the equation for g(x) and substitute -10
for every x you find and simplify the result.
.
In this problem you would get:
.
g(-10) = 70
.
Because there are no terms on the right side that contain an "x" there is no place that you
put a -10 on the right side. The right side just remains "70" and there is no need for
further simplifying. So the answer to your question is just:
.
g(-10) = 70
.
If your original problem had really been:
.
g%28x%29+=+x%5E2+-+4x+%2B+2
.
and you were then asked to find g(-10) you would go about it in the same way. That is
you would go to g(x) and replace every x with -10 to get:
.
g%28-10%29+=+%28-10%29%5E2+-+4%2A%28-10%29+%2B+2
.
Then you would simplify the right side knowing that %28-10%29%5E2+=+100 and -4%2A%28-10%29+=+40.
Substituting these values you would get:
.
g%28-10%29+=+100+%2B+40+%2B+2+=+142
.
So for the new problem g(-10) would be 142.
.
Hope this helps you to understand this type of operation a little better.