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Simplifying p2 = -4p + 21 Reorder the terms: p2 = 21 + -4p Solving p2 = 21 + -4p Solving for variable 'p'. Reorder the terms: -21 + 4p + p2 = 21 + -4p + -21 + 4p Reorder the terms: -21 + 4p + p2 = 21 + -21 + -4p + 4p Combine like terms: 21 + -21 = 0 -21 + 4p + p2 = 0 + -4p + 4p -21 + 4p + p2 = -4p + 4p Combine like terms: -4p + 4p = 0 -21 + 4p + p2 = 0 Factor a trinomial. (-7 + -1p)(3 + -1p) = 0Subproblem 1
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 = -7Subproblem 2
Set the factor '(3 + -1p)' equal to zero and attempt to solve: Simplifying 3 + -1p = 0 Solving 3 + -1p = 0 Move all terms containing p to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1p = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1p = 0 + -3 -1p = 0 + -3 Combine like terms: 0 + -3 = -3 -1p = -3 Divide each side by '-1'. p = 3 Simplifying p = 3Solution
p = {-7, 3}
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