4p^2=-21p-20

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Solution for 4p^2=-21p-20 equation:


Simplifying
4p2 = -21p + -20

Reorder the terms:
4p2 = -20 + -21p

Solving
4p2 = -20 + -21p

Solving for variable 'p'.

Reorder the terms:
20 + 21p + 4p2 = -20 + -21p + 20 + 21p

Reorder the terms:
20 + 21p + 4p2 = -20 + 20 + -21p + 21p

Combine like terms: -20 + 20 = 0
20 + 21p + 4p2 = 0 + -21p + 21p
20 + 21p + 4p2 = -21p + 21p

Combine like terms: -21p + 21p = 0
20 + 21p + 4p2 = 0

Factor a trinomial.
(4 + p)(5 + 4p) = 0

Subproblem 1

Set the factor '(4 + p)' equal to zero and attempt to solve: Simplifying 4 + p = 0 Solving 4 + p = 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 + p = 0 + -4 Combine like terms: 4 + -4 = 0 0 + p = 0 + -4 p = 0 + -4 Combine like terms: 0 + -4 = -4 p = -4 Simplifying p = -4

Subproblem 2

Set the factor '(5 + 4p)' equal to zero and attempt to solve: Simplifying 5 + 4p = 0 Solving 5 + 4p = 0 Move all terms containing p to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4p = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4p = 0 + -5 4p = 0 + -5 Combine like terms: 0 + -5 = -5 4p = -5 Divide each side by '4'. p = -1.25 Simplifying p = -1.25

Solution

p = {-4, -1.25}

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