Will medal:
How do I reflect over the x-axis?
Let's say I have an equation:
x^2+3x^2+9
and I want to do a vertical reflection on it, what steps would I follow in order to do so?

Question

anonymous · Answer

f(x)=x^2+3x^2+9
-f(x)=-(x^2+3x^2+9)
-f(x)=-x^2-3x^2-9

since reflect over the x-axis means the sign of the y is changed

anonymous · Answer

for a parabola equation f(x)=x^2+3x^2+9 its vertex  is pointing down all positive and if we revolved it to y axis we will have a solid of revolutionj..

anonymous · Answer

Yes