Question 1

What if a equals zero?

Accepted Answer

The equation is linear, not quadratic. Use bx + c = 0 instead.

Question 2

How is vertex related to roots?

Accepted Answer

Vertex lies on the axis of symmetry midway between roots when they are real and distinct.

Question 3

Can I see steps?

Accepted Answer

Results show discriminant and formula substitution; manual completing-the-square reinforces understanding.

Quadratic Formula Calculator

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