Math experts Help?
check and tell where I went wrong PLEASE
What is the axis of symmetry for y=x^2+7x+10
And this is what I got and I do not know where I went wrong but I did:
= (x+2)(x+5) = 0
x = -5
average of the two x-values is -3.5
so the axis of symmetry is the line x= -3.5
- 1 decade agoFavorite Answer
yes you're right
- 1 decade ago
You can sort of imagine the graph to be like a U-shaped curve, with the the vertical line passing through the lowest point of the curve (ie. the point where the slope of the graph is 0).
y = x^2 + 7x + 10
dy/dx = 2x + 7
When slope = 0, dy/dx = 0.
2x + 7 = 0
x = -7/2
So you're correct. If you haven't learned about differentiation, then your method is correct.