Graphing calc. died i need help

1. Oct 12, 2006

feod2003

Graphing calc. died :( i need help

could some 1 but this in a calc and tell me the intersection when y is 24?

(4+3x)(6+3x)=24

thanks :shy:

2. Oct 12, 2006

physicsgal

according to my calculator (just started using it a few days ago), it's a parabola (sp?) and the vertex is about x = -1.7, y = -1. that's just with me using the trace function (i dunno how to get the vertex the normal way). hope this helps.

~Amy

3. Oct 12, 2006

feod2003

did you put (4+3x)(6+3x) into y1, and 24 into y2, after that make window bigger than 2end trace 5, then you get it.

4. Oct 12, 2006

Staff: Mentor

Well, you obviously are sitting at a computer if you can post on PF that your graphing calculator died. Quiz question -- what application on your PC can be used for graphing? Hint -- it rhymes with Extra Large.

5. Oct 12, 2006

mr_coffee

hm..sounds like Extra Large.....Maple 8!

6. Oct 13, 2006

HallsofIvy

Staff Emeritus
Why would you need a calculator of any kind to do that? Multiply it out: 9x2+ 30x+ 24= 24 so 9x2+ 30x= 0. That's easy to factor and solve.