SOLUTION: I've been learning how to solve quadratic inequalties at school recently. I have no problems with them. But I am not sure how quadratic inequalities with a negative x^2 will be sol

Question 14278: I've been learning how to solve quadratic inequalties at school recently. I have no problems with them. But I am not sure how quadratic inequalities with a negative x^2 will be solved. i've been taught to use the graphical method of solving them. any help?
e.g.
y<-x^2+3x-8
y>-2x^2-7x+3
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
for something like we have to find the roots first, this being . We can just re-arrange this as . Solve that one.

Remember that when x^2 is +ve --> shape looks like a "u"
and that when x^2 is -ve --> shape looks like a "n"

So, once you have found the 2 roots, make sure your graph is n-shaped through those 2 points.

Look at th eQ now..where is y less than... it is less than to the left of the left root and to the right of the right root.

Hope this helps?... a bit difficult within good diagrams.

I think i have Lessons on this website too, so look at those to help you.

jon.

RELATED QUESTIONS
Hi, i need help with 2 problems for school study. I cant seem to work them out. If... (answered by ilana)

I'm not sure if it is radicals or not but we've been doing them in school lately. I have... (answered by Alan3354)

I am learning polynomials but have new clue how to solve with problems like this. this is (answered by angelagallegos)

Hello- I have recently returned to school and need help. It seems no one I know can... (answered by stanbon)

I am not sure if this the right subject to put this under but... I am helping a friend... (answered by solver91311)

Hi, Can someone please help me with the following: I have two equations that I need (answered by jim_thompson5910)

I am having trouble finding value of these problems, I have not been in a classroom for... (answered by Mathtut,josgarithmetic)

I am not sure how to solve these... (answered by tmarienatree)

So recently we have started learning how to divide polynomials but I am having trouble... (answered by josgarithmetic)