rearranging for quadratic

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Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

rearranging for quadratic

Postby Savannah Mance 4G » Thu Jan 16, 2020 6:17 pm

In the homework 5I.27 for part c, for the quadratic I got -2.92 instead of -4.92 and I'm not sure why. Can anyone help?

Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

Re: rearranging for quadratic

Postby Savannah Mance 4G » Thu Jan 16, 2020 6:18 pm

Sorry I meant to say I got -2.92 for b in the quadratic formula

Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

Re: rearranging for quadratic

Postby Riya Sood 4G » Thu Jan 16, 2020 7:23 pm

The way to ensure that you get -4.92, is by first simplifying the denominator. Once you do that you can multiply to the 0.56 (Kc value). At this point you should be at -3.92. And then we would subtract the equation we get from 3+x. And then -3.92-1= -4.92

Hope this helps.

Megan Kirschner
Posts: 46
Joined: Wed Feb 20, 2019 12:17 am

Re: rearranging for quadratic

Postby Megan Kirschner » Thu Jan 16, 2020 8:45 pm

I've found that first simplifying the denominator is the key to making these problems go smoothly. Always start with that.


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