Computer Science Canada Grade 10 Simple Quadratic Word Problem Question |
| Author: | Nathan4102 [ Thu May 09, 2013 5:43 pm ] | ||
| Post subject: | Grade 10 Simple Quadratic Word Problem Question | ||
Since I missed most of math today, I don't really get the new word problems in the homework. Could someone show me where I go next? I've already partially solved it I think. Q: Two numbers have a difference of 8. Find the numbers if their product is a minimum. A:
So I've put it in vertex form, which I know he wants us to do, but I'm not sure what to do from here. A bit of help would be awesome! Nathan |
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| Author: | Dreadnought [ Thu May 09, 2013 5:51 pm ] |
| Post subject: | Re: Grade 10 Simple Quadratic Word Problem Question |
x and 8-x have a difference of eight only when x is 0 or 8 |
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| Author: | Nathan4102 [ Thu May 09, 2013 6:32 pm ] |
| Post subject: | RE:Grade 10 Simple Quadratic Word Problem Question |
Must be x + 8 then? That would change my equation, but im still not sure where to go from there. E: In OP, ?'s are exponent 2s. |
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| Author: | Dreadnought [ Thu May 09, 2013 7:05 pm ] |
| Post subject: | Re: Grade 10 Simple Quadratic Word Problem Question |
x + 8 or x - 8 both work Once you get a parabola find the minimum (I'm assuming you know how to do this part). Congratulations you now know for which x you attain a minimum product. Now you just need to find the other number (x + 8 or x - 8, whichever you chose). |
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| Author: | Nathan4102 [ Thu May 09, 2013 7:17 pm ] |
| Post subject: | RE:Grade 10 Simple Quadratic Word Problem Question |
Ohhh ok, I was overthinking it. Thanks! |
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