How To Tell Where f(x) is Less Than 0 or Greater Than 0

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How to tell where f(x) greater than 0 or f(x) less than 0

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I watched numerous videos and no body made it this simple and clear. Thank you so much

sabreenaazad

So simple and down to the point. Thank you, Mr. Muscarella.

macoli

Doing the lord's work sir, I was stuck on the concept for hours until I saw this video. THANK. YOU.

reefkeef

i loved the "alright rockstar" lmao made me smile where now i got called a rockstar and i understand this

madfartman

watching this while I'm doing a test. great video.

lltensify

Awesome help. Broke it down into very few steps. Helped a lot! Thanks.

johncopenhaver

Thank you so much! I’m currently a 9th grader doing Honor Algebra 2/Trigonometry and my teacher would yell at me when I asked how to do this lesson because I couldn’t really understand the thought process behind it but when I watched this video, I fully understand it now!

VVater

You made me understand the doubt that had confused me for a few months. Thank You. Looking forward to your future math videos.

DDTFChanMeiYie

I’m so grateful for you sir, thank you.

andyvo

Thank you, you helped me with my math quiz. I was really confused and I’m taking online class so I can’t get ahold of my professor so quickly but this really helped!

jaelove.bts

struggling with pre cal but my degree requires cal 2. I have been getting discouraged that I might now be up to the task but youtubers like you Mr. Muscarella have explained these concepts so well and have given me hope that I can do this!

(small side note, if you have no x intercept at all that works the same as >&= when the quadratic only touches the x axis like your final example, yes? so (-infinity, +infinity) is the interval notation when you have no x int.?

joebro

thank you so much. I been stuck on this problem for awhile and I finally moved on

MathewAguayo

Please form the one if fx is greater or than the gx

makobejoshuachidi

Thanks for the vid really appreciate it

thatoseth

That helps so much, I couldn’t understand until I watch this, thank you so much

brianchen

Amazing video! So simple yet very good explanation to this.

fahmonki

7:00 I am trying to solve a parabola that is similar to this one except that it is below the x axis and the center of it is x=1/2 and y=-1/2. It never touches above x axis, so how can I determine the f(x) less that 0 with decreasing (1/2, infinite) and increasing (-infinite, 1/2)? I know it's never positive yet I never understood how to right it like f(x)<0 on (?, ?)U(?, ?) And f(x) is never positive?

cristiancalderon

Yeah, but how about when you only got the function?

Rajivrocks-Ltd.

Thank you so much sir I am very grateful

amcecast

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