3p^2-9p=84

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Solution for 3p^2-9p=84 equation:


Simplifying
3p2 + -9p = 84

Reorder the terms:
-9p + 3p2 = 84

Solving
-9p + 3p2 = 84

Solving for variable 'p'.

Reorder the terms:
-84 + -9p + 3p2 = 84 + -84

Combine like terms: 84 + -84 = 0
-84 + -9p + 3p2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-28 + -3p + p2) = 0

Factor a trinomial.
3((-4 + -1p)(7 + -1p)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-4 + -1p)' equal to zero and attempt to solve: Simplifying -4 + -1p = 0 Solving -4 + -1p = 0 Move all terms containing p to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1p = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1p = 0 + 4 -1p = 0 + 4 Combine like terms: 0 + 4 = 4 -1p = 4 Divide each side by '-1'. p = -4 Simplifying p = -4

Subproblem 2

Set the factor '(7 + -1p)' equal to zero and attempt to solve: Simplifying 7 + -1p = 0 Solving 7 + -1p = 0 Move all terms containing p to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1p = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1p = 0 + -7 -1p = 0 + -7 Combine like terms: 0 + -7 = -7 -1p = -7 Divide each side by '-1'. p = 7 Simplifying p = 7

Solution

p = {-4, 7}

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