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Help : Algebra

\(87.75 = R^2 - 7R \)

How to get \( R\) ?

I tried many times but i didn't get it

The answer is \(13.5\) but i don't know how to get it

Note by Jason Chrysoprase
5 months, 1 week ago

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Use the quadratic formula and solve for \(r\).

In fact you get two answers, 13.5 and -6.5 Svatejas Shivakumar · 5 months, 1 week ago

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@Svatejas Shivakumar Thx man, ur awesome Jason Chrysoprase · 5 months, 1 week ago

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@Jason Chrysoprase my pleasure :) Svatejas Shivakumar · 5 months, 1 week ago

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@Jason Chrysoprase You may refer to this wiki to learn them more effectively. :V Anyways, one typo, your heading; change it into Help:Algebra currently it is Help:Algera, ;P Ashish Siva · 5 months, 1 week ago

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Keep learning. Your passion in math will pay off. Sal Gard · 4 months ago

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