Hi,

I have been sitting at this function for a couple of hours, trying to solve it.

0.1w^2 + 2155w + 20

I am kind of dumbfounded by this. Even if I factor out the 0.1, I cannot figure this out.

Appreciate your help,

Alex

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- Jan 24th 2011, 03:07 PMalex95Solving this function with quadratic formula
Hi,

I have been sitting at this function for a couple of hours, trying to solve it.

0.1w^2 + 2155w + 20

I am kind of dumbfounded by this. Even if I factor out the 0.1, I cannot figure this out.

Appreciate your help,

Alex - Jan 24th 2011, 03:11 PMdwsmith
- Jan 24th 2011, 03:27 PMArchie Meade
- Jan 24th 2011, 03:32 PMalex95
Yes, equal to 200

Thanks,

Alex - Jan 24th 2011, 03:36 PMe^(i*pi)
Now it's equal to something you can put into the form by subtracting 200 from both sides

becomes then plug and chug.

Of course which means - Jan 24th 2011, 03:42 PMArchie Meade
Ok,

well you can set it up using dwsmith's method, which applies the "abc robot"

but the expression must be equal to zero to use that.

Multiplying zero by anything is zero, so multiply by 10 for convenience

Alternatively,

Multiply both sides by 10.

Take square roots and finally subtract 10775 from both sides.