(9p^2+7p)+(5p^2-4p-12)=0

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Solution for (9p^2+7p)+(5p^2-4p-12)=0 equation:


Simplifying
(9p2 + 7p) + (5p2 + -4p + -12) = 0

Reorder the terms:
(7p + 9p2) + (5p2 + -4p + -12) = 0

Remove parenthesis around (7p + 9p2)
7p + 9p2 + (5p2 + -4p + -12) = 0

Reorder the terms:
7p + 9p2 + (-12 + -4p + 5p2) = 0

Remove parenthesis around (-12 + -4p + 5p2)
7p + 9p2 + -12 + -4p + 5p2 = 0

Reorder the terms:
-12 + 7p + -4p + 9p2 + 5p2 = 0

Combine like terms: 7p + -4p = 3p
-12 + 3p + 9p2 + 5p2 = 0

Combine like terms: 9p2 + 5p2 = 14p2
-12 + 3p + 14p2 = 0

Solving
-12 + 3p + 14p2 = 0

Solving for variable 'p'.

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

Divide each side by '14'.
-0.8571428571 + 0.2142857143p + p2 = 0

Move the constant term to the right:

Add '0.8571428571' to each side of the equation.
-0.8571428571 + 0.2142857143p + 0.8571428571 + p2 = 0 + 0.8571428571

Reorder the terms:
-0.8571428571 + 0.8571428571 + 0.2142857143p + p2 = 0 + 0.8571428571

Combine like terms: -0.8571428571 + 0.8571428571 = 0.0000000000
0.0000000000 + 0.2142857143p + p2 = 0 + 0.8571428571
0.2142857143p + p2 = 0 + 0.8571428571

Combine like terms: 0 + 0.8571428571 = 0.8571428571
0.2142857143p + p2 = 0.8571428571

The p term is 0.2142857143p.  Take half its coefficient (0.1071428572).
Square it (0.01147959185) and add it to both sides.

Add '0.01147959185' to each side of the equation.
0.2142857143p + 0.01147959185 + p2 = 0.8571428571 + 0.01147959185

Reorder the terms:
0.01147959185 + 0.2142857143p + p2 = 0.8571428571 + 0.01147959185

Combine like terms: 0.8571428571 + 0.01147959185 = 0.86862244895
0.01147959185 + 0.2142857143p + p2 = 0.86862244895

Factor a perfect square on the left side:
(p + 0.1071428572)(p + 0.1071428572) = 0.86862244895

Calculate the square root of the right side: 0.931999168

Break this problem into two subproblems by setting 
(p + 0.1071428572) equal to 0.931999168 and -0.931999168.

Subproblem 1

p + 0.1071428572 = 0.931999168 Simplifying p + 0.1071428572 = 0.931999168 Reorder the terms: 0.1071428572 + p = 0.931999168 Solving 0.1071428572 + p = 0.931999168 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.1071428572' to each side of the equation. 0.1071428572 + -0.1071428572 + p = 0.931999168 + -0.1071428572 Combine like terms: 0.1071428572 + -0.1071428572 = 0.0000000000 0.0000000000 + p = 0.931999168 + -0.1071428572 p = 0.931999168 + -0.1071428572 Combine like terms: 0.931999168 + -0.1071428572 = 0.8248563108 p = 0.8248563108 Simplifying p = 0.8248563108

Subproblem 2

p + 0.1071428572 = -0.931999168 Simplifying p + 0.1071428572 = -0.931999168 Reorder the terms: 0.1071428572 + p = -0.931999168 Solving 0.1071428572 + p = -0.931999168 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.1071428572' to each side of the equation. 0.1071428572 + -0.1071428572 + p = -0.931999168 + -0.1071428572 Combine like terms: 0.1071428572 + -0.1071428572 = 0.0000000000 0.0000000000 + p = -0.931999168 + -0.1071428572 p = -0.931999168 + -0.1071428572 Combine like terms: -0.931999168 + -0.1071428572 = -1.0391420252 p = -1.0391420252 Simplifying p = -1.0391420252

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.8248563108, -1.0391420252}

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