Algebra

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Algebra

Solve: p^2 - 8p + 21=6

P=?
Proof Proof
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Re: Algebra

p² - 8p + 21 = 6
p² - 8p + 15 = 0   subtracted 6
(p - 5)(p - 3) = 0   factored into two binomials
p - 5 = 0   or  p - 3 = 0   set each equal to zero
p = 5   or   p = 3   solved each equation

- Proof