Wednesday

November 26, 2014

November 26, 2014

Posted by **Rose** on Monday, February 27, 2012 at 5:23pm.

- Mat/117 DQ1 -
**Damon**, Monday, February 27, 2012 at 6:22pmYou can tell by the discriminant

a x^2 + b x + c = 0

look at

b^2 - 4 ac

If positive, then two real solutions

If zero, then vertex on x axis and both solutions are the same

If negative, then no real solutions, solutions are complex numbers

for the rest, work up from factors

for example

(x-1)(x-2) = 0 two real x = 1 or 2

x^2 -3 x + 2 = 0

for example

(x-2)(x-2)

x^2 - 4 x + 4 = 0 one solution (or two both the same)

(x-i)(x+i) = 0

x^2 - i^2 = x^2+1 = 0 no real solutions

**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 ...

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

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 Concept - • If you are looking at a graph of a quadratic equation, how ...

algebra - i have very little information in my math book on the following ...

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

Quadratic -Make up a problem - I am supposed to write a quadratic equation in ...