Question 1101049
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what is the equation of the function which has a graph that is the reflection across the x-axis of the graph of f(x) = x^2+2x-5 ?
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The function for the reflected graph is


g(x) = - f(x):   you only need to change the sign at the function to the opposite one.


So,  g(x) = -(x^2+2x-5) = -x^2 - 2x + 5.
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It is how the reflection about the x-axis works: (x,y)  ---->  (x,-y).