Wednesday

November 26, 2014

November 26, 2014

Posted by **Marysvoice** on Wednesday, February 13, 2008 at 7:31am.

- Algebra Quadratic Equations -
**drwls**, Wednesday, February 13, 2008 at 7:47amThe statement is true, if you are talking about a graph of ax^2 + bc + c vs x, and if the equation you are trying to solve is

ax^2 + bx + c = 0

Another way of predicting the number of solutions is calculatin b^2 - 4ac. If it is zero there is one solution. If it is postive there are two. If it is negative there are none.

- Algebra Quadratic Equations -
**Guido**, Wednesday, February 13, 2008 at 4:53pmYou are referring to the discriminant, which is part of the quadratic formula in the RADICAND section.

Here is how the discriminant works:

Given a quadratic equation in the forn

ax^2 + bx + c = 0, plug the coefficients into the expression

b^2 - 4ac to see what happens. The expression b^2 - 4ac is called the DISCRIMINANT and it is located in the RADICAND section of the quadratic formula.

1-If you get a positive number, the quadratic will have 2 unique solutions.

2-If you get ZERO, the quadratic will have exactly ONE solution, a double root.

3-If you get a negative number, the quadratic will have NO real solutions, just TWO imaginary ones. In other words, solutions will have the letter i, which is short for "imaginary number."

Is this clear?

**Answer this Question**

**Related Questions**

algebra II - How do you know if a quadratic equation will have one, two, or no ...

algebra II - How do you know if a quadratic equation will have one, two, or no ...

ALGEBRA-MAT117 - How do you know if a quadratic equation will have one, two, or ...

ALGEBRA - How do you know if a quadratic equation will have one, two, or no ...

Algebra - How do you know if a quadratic equation will have one, two, or no ...

Mat/117 DQ1 - How do you know if a quadratic equation will have one, two, or no...

questions - 1.) Why are there usually two solutions in quadratic equations? 2...

Algebra II - 1)What method(s) would you choose to solve the equation: x2 + 2x - ...

Algebra Quadratic Equations - I am supposed to write a quadratic equation using ...

algebra - : In case of a quadratic function, why are there two x-intercepts and ...