SOLUTION: Solve the quadratic inequality. Write the solution set in interval notation and show the complete solution. 2𝑥^2≤5𝑥−2

Algebra.Com
Question 1087726: Solve the quadratic inequality. Write the solution set in interval notation and show the complete solution.
2𝑥^2≤5𝑥−2

Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!


Critical x values are at .
The quadratic expression will be BELOW 0 between and .
For the "... equal to" part, the two values are included.
Interval Notation: [ 1/2, 2 ]

Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.
 <= .

Move the terms from the right side to the left, changing the signs. You will get an equivalent inequality

 <= 0.

Factor the left side:

(2x-1)*(x-2) <= 0.


Divide both sides by 2. You will get an equivalent inequality

(x-1/2)*(x-2) <= 0.     (1)


1)  If  x <   then both factors (each factor) in the left side of (1) are/is negative,
    So the product is positive.


2)  If   < x < 2  then the factor (x-1/2) is positive, while the factor (x-2) in the left side of (1) is negative,
    so the product is negative.


3)  If 2 < x  then both factors (each factor) in the left side of (1) are/is positive,
    so the product is positive.


Answer.  The given inequality has  the segment  [1/2,2] as the solution set.

Solved.


If you want to learn on how to solve quadratic inequalities, read the lesson
    - Solving problems on quadratic inequalities
in this site.

Also,  you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lesson is the part of this online textbook under the topic "Inequalities".


RELATED QUESTIONS

Please solve the quadratic inequality. Write the solution set in interval notation and... (answered by ikleyn)
Solve the quadratic inequality. Write the solution set in interval notation. Show the... (answered by ikleyn)
Solve the quadratic inequality. Write the solution set in interval notation. Show the... (answered by ikleyn)
Solve the quadratic inequality below, please write the solution set in interval notation... (answered by jorel1380)
Solve the quadratic inequality below, please write the solution set in interval notation... (answered by Tatiana_Stebko,josgarithmetic)
Solve the quadratic inequality. Write the solution set in interval notation. Show the... (answered by KMST)
Solve the quadratic inequality. Write the solution set in interval notation. Show the... (answered by ikleyn)
Solve the inequality and write the solution set in interval notation. 2 < |x| –... (answered by Fombitz)
Solve the quadratic inequality below, please write the solution set in interval notation... (answered by Alan3354)