# College Algebra

posted by .

I could not figure out the answer to this Problem:

f(x)= -2x^2 =4x +3 can be used to solve the following inequality:
-2x^2 -4x < -3

First use the Quadratic Formula to find the x-intercept of f.

This problem asks that the answer be separated by commas and rounded to nearest tenth

Also solution set is requested and put in interval notation and numbers rounded to nearest tenth

My answers to this problem where incorrect The x-intercepts I found were 2.4,5.8
and the solution set I had is: (-infinity, 2.4] union [5.8,infinity)

• College Algebra -

-2x^2 - 4x + 3 = 0 or
2x^2 + 4x - 3 = 0 yields
x = (-4 ± √40)/4

so x < -2.58 OR x > .58

round off and express in the form they want.

• College Algebra -

So once I have to convert sqrt of 40 and solve from there?

• College Algebra -

Thank you so much for your help.

## Similar Questions

1. ### math,correction

Problem 10 use the quadratic formula to solve each of the following quadratic equations. 2x^2-5x = 3 My answer: solutions are 3 and - (1)/(2) Problem 16 3x^2-2x+1=0 My answer: (2+- radical (-8))/(6)
2. ### math,algebra

can someone help me out factor out this 0=16t^2-122t+180 i have so far this but the last one i am not sure 8(2t^2-14t + ?
3. ### Math

Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about …
4. ### algebra

which quadratic formula would be used to solve the following quadratic equation?
5. ### Algebra

I was given this answers to a problems I solved but I do not understand what she means hope you can help. Before attempting to solve this quadratic equation, determine how many solutions there will be for this quadratic equation. Explain …
6. ### Algebra

I was given this answers to a problems I solved but I do not understand what she means hope you can help. Before attempting to solve this quadratic equation, determine how many solutions there will be for this quadratic equation. Explain …
7. ### College Algebra

Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic …