Solving Quadratic Inequalities - The Basics

Solving Quadratic Inequalities - The Basics. In this video, I discuss the basic idea of how to solve quadratic inequalities.
Two simple examples are shown.
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Category:

Education

Tags:

• math
• algebra
• prealgebra
• ACT
• SAT
• AP
• quadratic
• inequality
• solve
• solutions
• justmathtutoring.com
• number
• line
• inequalities

[petkol]

You are my herooooOOOOO!!! (play the Hero song in the backround)

[patrickJMT]

@petkol ahahah, is my picture on your wall? you should tape a big one on the front of your math book.

[MrAddddyyy]

Not only are you a genius, but you're comments are hilarious. Like actually.

[patrickJMT]

@MrAddddyyy i try : )

[Iwatchsexyvideos]

good help get a better mic though :/

[patrickJMT]

@Iwatchsexyvideos glad my video is sexy

[superj1e2z6]

thank you. Now I know!

[Syma99]

can you tell me how you would answer a question like this?

| X^2 - 1| is greater than or equal to |x| + |x+1|

Thanks

[sweetkiss951]

Thank you! You explain it really well.

[xSenioritis]

@rosaliecullen21 It's (-4)^2 and not -(4)^2

[PurrfectKitteh]

Your left handed.

[samx36]

glad i found this video, helpful

[Retroz11]

lol why 2.5 ???

[rosaliecullen21]

for the last problem what do you mean by anything from positive infinit to negative infinity will work? -4 doesn't work and isn't negative 4 included in your solution . since ur saying negative infinity ur saying -4 will work but it doesn't -4^2+4=-12

[nghi1350]

The video lesson is great for students who learn the solving process for the first time. However, they don't need to repeat all solving steps each time. They only need to use a simple rule when solving by the number line and test point  method.

First, plot 2 real roots on the number line. They divide it into 1 segment and 2 rays. Always use O as test point. Substitute x = 0 into the inequality. If it is true, then the origin is located on the true segment (or true ray). Use intervals for answers

[nevergobroke559]

one day i wish i could solve math like him omg