Answer:
.
Step-by-step explanation:
So we are given the equations are equal for .
If the functions are equal for those values then their difference is zero for those values:
Combine like terms; keep in mind we are subtracting over the parenthesis:
Since all terms have a common factor of 2, then divide both sides by 2:
When compared to we should see:
Now use quadratic formula.
Plug in the values we found:
Let's simplify:
92 isn't a perfect square but contains a factor that is; 92=4(23):
Divide top and bottom by since all three terms have a common factor 2:
So f and g are equal for:
When compared to we see that .