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No, sometimes the entire graph is completely above (or completely below) the x axis.

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Q: Do all quadratic functions have x intercepts?
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Related questions

What determines if a quadratic function has no x-intercepts?

If the quadratic function is written as ax2 + bx + c, then it has no x-intercepts if the discriminant, (b2 - 4ac), is negative.


Is it possible for the graph of a quadratic function to have two y-intercepts?

Yes. A quadratic function can have 0, 1, or 2 x-intercepts, and 0, 1, or 2 y-intercepts.


How do you solve a quadratic equation graphically?

The roots of the quadratic equation are the x-intercepts of the curve.


Why do you need x intercepts for quadratic equations?

so you can find the solution for the x-values. the x-intercepts are when the graph crosses the x-axis


How would you use intercepts to find the vertex in a quadratic equation with two x intercepts?

The vertex must be half way between the two x intercepts


Which quadratic function when graphed has x-intercepts of -5 and 2?

(x + 5)(x - 2)x2 + 3x - 10this is your quadratic equation


Does every quadratic function have 2 x intercepts?

Only if the discriminant of its equation is greater than zero will it have 2 different x intercepts.


What are the zeros of functions and what do they represent?

The zeros of functions are the solutions of the functions when finding where a parabola intercepts the x-axis, hence the other names: roots and x-intercepts.


How do you make a graph of a quadratic function that has x-intercepts at 0 and 4?

That's not enough information to draw the graph. All you know is that it crosses the x-axis at those 2 points. You don't know whether it opens upward or downward, or how far the nose is above or below the x-axis. You need more information about the function before you can graph it. This is just another way of saying that there are an infinite number of different quadratic functions that all have those same x-intercepts.


Is it true that some quadratic functions cannot be graphed?

All quadratic functions with real coefficients can be graphed on a standard x-y graph. Not all quadratic functions have real roots, maybe that's what you were thinking of?


You can easily identify the x-intercepts of a graph of a quadratic function by writing it as two binomial what?

You can easily identify the x-intercepts of a graph of a quadratic function by writing it as two binomial factors! Source: I am in Algebra 2 Honors!


What does factoring a quadratic allow you to do?

Factoring a quadratic allows you to solve the x and y intercepts. The x-intercepts in the factored form are the inverse of the constants. The y-intercept is the product of the x-intercepts multipied together. Example: x²-10x-24 = (x+2)(x-12) +2 and -12 are the constants. So ur x-intercepts are (-2,0) (12,0). The y intercept is -24 because -2 X 12 = -24.