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7-6/7-7 Factoring With Word Problems 2 (Friday 3/3)

Added Mar 01, 2017 •

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next example one the length of a rectangular State Park rectangular main are keyword  is does longer than twice its width the area of the park is 84 square miles I'd like you to try and start this off with your partner posit Wanted 2 minutes get it started and then I will talk through it in just a second okay so I highlighted rectangular State Park so I'm going to again sketch out a rectangle  and it says the length again is 2 miles longer than twice the width  shochu miles longer than twice the width the other side is our width we know area is length times width length times width and our length is our area they told us is 84  so I'm going to say 84 equal to what does 2 + 2W sorry all sorts of mistakes of the moment * W * width tire plugged into plus 2W for length and then still have to multiply it by your with sorry for equals 2 w + 2 W Squared subtract 84 over and I'm going to rearrange it into standard form so what is 84  -84 and I'm going to put it in standard standard form so equals 2 W Square  plus 2W  mine is 84 what do we always check for first GCF do these two equations have a GC does this equation have a GCF the answer is yes it is too so I'm going to divide everything by 2 divided by 2 divided by 2 right and then A2 comes 0 equals 2 comes on the outside  and I have W squared plus w  minus  42 Phantasy Star my rectangle got in the way of my writing hope you guys can still see you outside what multiplied W Squared W & W what multiplies to 42 this is going to be six and seven check it we got six w7w can we make 6 W + 7 W positive 1w  yes what is the which one is positive  the seven is positive which means the six is negative am I done with this problem no of course not why would I be done so fast set everything equal 200 equals 2 is that true no cancel it out W minus 6 equals 0 at 6 to go sides W equals 6 4 W + 7 equals 0 subtract 7 double size W equals 7 is not true no that can't work toss that out so are with has to be 6 we also still need to your length so plug-in 6 for a laptop l equals 2 + 2 * 6 that was my cuckoo clock and then we have to * 6 + 12 + 2 is teen so our length is 14 and again we are talking in miles miles hey so I have those two length and width Part B says what is the perimeter how do you find the perimeter of something out of all the sides well I know that my length is 14 in my width is 6 this size 6 what's the opposite side going to be 6 if one size 14 Saucy going to be 14 so 6 + 6 + 1214 + 14 is 2812 + 28 is 40  miles for the perimeter cuz we just added up all the sides and maybe you want to make a note all sides  beautiful again doing these problems kind of take a while so I'm going to go ahead and stop at here and you guys can talk to Partners make sure you guys followed all of that and move on to the next one also don't forget that these videos are posted on my website so if you didn't understand everything or you need to posit in different spots that you can like slow down and catch up that's fine watch them online

Uploaded by Lauren Stouffer.

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7-6/7-7 Factoring With Word Problems 2 (Friday 3/3)

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