View Single Post
Mark44
#2
Feb19-12, 07:31 PM
Mentor
P: 21,214
Quote Quote by LearninDaMath View Post
A quadratic equation has the form y = ax^2 + bx + c.
What you're showing is a quadratic function. A quadratic equation in standard form looks like this:
ax2 + bx + c = 0
Quote Quote by LearninDaMath View Post
However, if c = 0, then y = ax^2 + bx. Is it still called a quadratic equation?
ax2 + bx = 0 is still a quadratic equation. The only restriction is that a [itex]\neq[/itex] 0.
Quote Quote by LearninDaMath View Post
And if b = 0 so that y = ax^2, is it still given the title of quadratic equation?

I would guess yes since it still has a power of 2 and is a parabola. Is this correct?