9p^2+12p-77=-4

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Solution for 9p^2+12p-77=-4 equation:


Simplifying
9p2 + 12p + -77 = -4

Reorder the terms:
-77 + 12p + 9p2 = -4

Solving
-77 + 12p + 9p2 = -4

Solving for variable 'p'.

Reorder the terms:
-77 + 4 + 12p + 9p2 = -4 + 4

Combine like terms: -77 + 4 = -73
-73 + 12p + 9p2 = -4 + 4

Combine like terms: -4 + 4 = 0
-73 + 12p + 9p2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-8.111111111 + 1.333333333p + p2 = 0

Move the constant term to the right:

Add '8.111111111' to each side of the equation.
-8.111111111 + 1.333333333p + 8.111111111 + p2 = 0 + 8.111111111

Reorder the terms:
-8.111111111 + 8.111111111 + 1.333333333p + p2 = 0 + 8.111111111

Combine like terms: -8.111111111 + 8.111111111 = 0.000000000
0.000000000 + 1.333333333p + p2 = 0 + 8.111111111
1.333333333p + p2 = 0 + 8.111111111

Combine like terms: 0 + 8.111111111 = 8.111111111
1.333333333p + p2 = 8.111111111

The p term is 1.333333333p.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333p + 0.4444444442 + p2 = 8.111111111 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333p + p2 = 8.111111111 + 0.4444444442

Combine like terms: 8.111111111 + 0.4444444442 = 8.5555555552
0.4444444442 + 1.333333333p + p2 = 8.5555555552

Factor a perfect square on the left side:
(p + 0.6666666665)(p + 0.6666666665) = 8.5555555552

Calculate the square root of the right side: 2.924988129

Break this problem into two subproblems by setting 
(p + 0.6666666665) equal to 2.924988129 and -2.924988129.

Subproblem 1

p + 0.6666666665 = 2.924988129 Simplifying p + 0.6666666665 = 2.924988129 Reorder the terms: 0.6666666665 + p = 2.924988129 Solving 0.6666666665 + p = 2.924988129 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + p = 2.924988129 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + p = 2.924988129 + -0.6666666665 p = 2.924988129 + -0.6666666665 Combine like terms: 2.924988129 + -0.6666666665 = 2.2583214625 p = 2.2583214625 Simplifying p = 2.2583214625

Subproblem 2

p + 0.6666666665 = -2.924988129 Simplifying p + 0.6666666665 = -2.924988129 Reorder the terms: 0.6666666665 + p = -2.924988129 Solving 0.6666666665 + p = -2.924988129 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + p = -2.924988129 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + p = -2.924988129 + -0.6666666665 p = -2.924988129 + -0.6666666665 Combine like terms: -2.924988129 + -0.6666666665 = -3.5916547955 p = -3.5916547955 Simplifying p = -3.5916547955

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.2583214625, -3.5916547955}

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