SOLUTION: Use the discriminant to find how many places the quadratic function crosses the x-axis.
4x^2 + 8x = 0
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Question 193802: Use the discriminant to find how many places the quadratic function crosses the x-axis.
4x^2 + 8x = 0
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Rewrite your equation:
So:
Discriminant:
Plug in the values and calculate.
One point of intersection (the x-axis is tangent to the curve at the vertex)
Two points of intersection, i.e. two real number roots.
No points of intersection, i.e. the roots are a conjugate pair of complex numbers.
John
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