Let f(x) = y
thus y =
switch the position of y and x in the equation
then solve for y in this case
∴ y=
Thus,
If f (x) = x2 + 3x – 2 , find f (-2). PLEASE HELP!
1 answer:
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Let f(x) = y
thus y =
switch the position of y and x in the equation
then solve for y in this case
∴ y=
Thus,
Answer:
Step-by-step explanation:
Using FOIL (First, outer, inner, last)
First, we multiply 3x and x to get (First)
We then multiply 3x and 1 to get (outer)
Then 4 and x to get (Inner)
Then multiply 1 and 4 to get (last)
Since the quadratics are all positive, we add all the terms together to get:
. Since 3x and 4x are like terms, we add them together and simplify to get:
And since we can't simplify any further, that's our answer!
Hope this helps :D