SOLUTION: please help please help I have the correct information now sorry please show plot the graph y=log3x polynomial 7x^2 + x + 5 thank you so much

Algebra ->  Linear-equations -> SOLUTION: please help please help I have the correct information now sorry please show plot the graph y=log3x polynomial 7x^2 + x + 5 thank you so much      Log On


   



Question 173985This question is from textbook
: please help please help
I have the correct information now sorry
please show plot the graph
y=log3x

polynomial
7x^2 + x + 5
thank you so much
This question is from textbook

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
please help please help
I have the correct information now sorry
please show plot the graph
y=log3x
I have to figure out how to do graphs on the site.
If you have Excel, you can do it on that.
If you email me at gsihoutx@aol.com, I can graph it, scan it, and email it to you.
----------------
polynomial
7x^2 + x + 5
Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)
Quadratic equation ax%5E2%2Bbx%2Bc=0 (in our case 7x%5E2%2B1x%2B5+=+0) has the following solutons:

x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca

For these solutions to exist, the discriminant b%5E2-4ac should not be a negative number.

First, we need to compute the discriminant b%5E2-4ac: b%5E2-4ac=%281%29%5E2-4%2A7%2A5=-139.

The discriminant -139 is less than zero. That means that there are no solutions among real numbers.

If you are a student of advanced school algebra and are aware about imaginary numbers, read on.


In the field of imaginary numbers, the square root of -139 is + or - sqrt%28+139%29+=+11.7898261225516.

The solution is , or
Here's your graph:
graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+7%2Ax%5E2%2B1%2Ax%2B5+%29