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7.7 Factoring Special Products 3 (Thursday 3/2)

Added Mar 01, 2017 •

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example for solving a polynomial equation I'm actually really glad I didn't keep going on this one what is scary how about this problem yes the fractions so let's get rid of them what is the common denominator player with 9 and 3 hopefully you guys are saying 9 so I'm going to just take this whole equation and multiply everything times 9 so ruined you acquired x 9 this right here x 9 this right here what time is 9 and even 0 x 9  so when I multiply x 9 or maybe I should do like the little X cuz the dots look like decimal points can soap x squared x 9 just gives you 9 x squared when we do 2 / 3 x 9 how many times can 3 go into 9  three times so across that out to turn that into a threesome. have 2 x 3 which becomes a 6X and then how many times can 9 go into 9 1 * let's cancel out and one what's 1 times 1  it is one self plus one equals 9 times 0 is 0 now this is our new problem and we can Factor this instead which is so much nicer than if we were to factor the thing with the fractions right right so what I'm going to do  is there no there's no GCF so parentheses parentheses what multiplies to 9 3 + 3 what multiplies to x squared x x what multiplies to 111 don't forget about the equal zero chilling over here and then check it this is 3x  this is three axe someone makes 3x + 3x positive 6X the answer is yes what a both my signs need to be  plus and plus we notice that it is the same thing this equal 0 what does that mean means you have to set sit down and write and write two separate equations so I'm going to do that right over here I'm so we have 3x + 1 equals 0 + 3x + 1 equal zero question do I have to solve both no because they are the same thing so I'm just going to sell one of them mice 1-1 3x equals -1 divided by 3 divided by 3 x equals negative one third and we're just going to leave our answer as fractions and accept that they are fractions and then how far ride lab by 9 to get rid of the fraction but once you did that are factoring turned out super easy and good to go actually don't think I put any of you on your homework but it was worth doing just so you guys could see a way that you could get rid of fractions if you needed to I'm hopefully you guys have plenty of time to get started on your homework  I will talk to you tomorrow via video notes play thrilling there Thursday by guys

Uploaded by Lauren Stouffer.

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7.7 Factoring Special Products 3 (Thursday 3/2)

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