Thursday

April 24, 2014

April 24, 2014

Posted by **B.B.** on Friday, September 18, 2009 at 6:55am.

Give the solutions to the following quadratic equation by examining the graph of the related quadratic function:

Graph: y=x^2+2x-15

Equation: x^2+2x-15=0

Thanks so much.

- Math -
**Reiny**, Friday, September 18, 2009 at 7:33amalgebraic solution:

(x+5)(x-3) = 0

so x = -5 or x = 3

When you graphed it, did you not get a parabola that opened upwards and crossed the x-axis at -5 and 3 ?

- Math -
**drwls**, Friday, September 18, 2009 at 7:34amWe can't draw graphs for you; you can and should do that yourself.

Since the equation can be factored to (x+5)(x-3) = 0,

the solutions are x=-5 and +3.

**Related Questions**

Math - I am stumped on this problem could someone please help? Give the ...

ALGEBRA - What does it mean to give the solutions to the following quadratic ...

math - State the solutions, or estimated solutions, to each quadratic equation ...

Quadratic Functions - Please explain to me how to do the following problems, I ...

math - Sketch the graph of a quadratic function for which the related quadratic ...

MATH - Sketch the graph of a quadratic function for which the related quadratic ...

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

Please help! quadratic equation - Given the following quadratic equation find. a...

College Algebra - 1.Answer the following for the given quadratic function. f(x...

math - 1.How is the maximum or minimum point of the original quadratic function ...