Completing the Square in 60 Seconds

Learn the factoring method called "completing the square"

Category:

Entertainment

Tags:

• math
• crazy
• mathcrazy
• mathcrazymadera
• madera
• tutor
• tutoring
• algebra
• factor
• completing
• square

[MathZar09]

no! no! no! Ignoring the 8x just gives the impression that x^2 + 4^2 = (x+4)^2 WHICH IS FALSE!  That is a major concept that I spend a lot of time in calculus trying to get out of my students heads! SHORT CUTS ARE BAD! Do not do this!

[PoliticalJohn]

Your explanation causes me to rage at EVERY damn math teacher I have ever had. Why couldn't they explain it that easily?

[willghass]

@zoobat20 That's if you solve it for x.

[carlcampbell7]

@Rienclue x(2x-7)=0

x=0 and 2x-7=0

so x=0 and x=7/2

[Rienclue]

i have a question. How to find the values of x in x(2x - 7) = 0

please, i really really don't know how to find it. I hope u can help me . Thanks..

[135meredith]

@TheMolotovTaco I don't mean to sound condescending or anything, but there is no link, dear sir... I'd love to see what you've got to though.

[ThunderCatMovies]

88 seconds -_-

[FuzzyOpposum]

@PoliticalJohn Because that way doesn't teach you what you're doing.. xD

[TheMolotovTaco]

@135meredith Let me help you bro. watch?v=gzm-uhj06q8&feature=ch­annel_video_title

Even though your math test is long gone, you will want to watch this. Save the channel too, it's absolutely fantastic for studying and getting past terrible lectures.

[TheMolotovTaco]

@MathZar09 The biggest issue is that kids like me may not understand HOW and WHY the 8x is being "ignored." When I was taught this, I was told to ignore it and I completely shut down on the concept. It made no sense. Now, after a KhanAcadmey video, I see that it's a simple (x+a)^2 concept, and I can understand how the 8x is there and where the (x+a)^2 comes from.

I agree, teaching the concept with shortcuts is detrimental to learning, I have experienced this first hand.

[zoobat20]

the real answer after finding the square should be x= 0.35889894 and x= -8.35889894

[TheXxLennonxX]

Made soo much harder for yourself