piggysundew piggysundew

05-03-2017
Mathematics

Answered

SA=πr^2-πr solve for r

Verified Answer :

soooobored soooobored

05-03-2017

a great time to apply the quadratic formula
for a quadratic equation
Ax^2 + Bx +C =0

then
\(x= \frac{-b\pm \sqrt{b^2-4ac}}{2a}\)

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