2p^2=7-12p

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Solution for 2p^2=7-12p equation:


Simplifying
2p2 = 7 + -12p

Solving
2p2 = 7 + -12p

Solving for variable 'p'.

Reorder the terms:
-7 + 12p + 2p2 = 7 + -12p + -7 + 12p

Reorder the terms:
-7 + 12p + 2p2 = 7 + -7 + -12p + 12p

Combine like terms: 7 + -7 = 0
-7 + 12p + 2p2 = 0 + -12p + 12p
-7 + 12p + 2p2 = -12p + 12p

Combine like terms: -12p + 12p = 0
-7 + 12p + 2p2 = 0

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

Divide each side by '2'.
-3.5 + 6p + p2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 6p + 3.5 + p2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 6p + p2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 6p + p2 = 0 + 3.5
6p + p2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
6p + p2 = 3.5

The p term is 6p.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6p + 9 + p2 = 3.5 + 9

Reorder the terms:
9 + 6p + p2 = 3.5 + 9

Combine like terms: 3.5 + 9 = 12.5
9 + 6p + p2 = 12.5

Factor a perfect square on the left side:
(p + 3)(p + 3) = 12.5

Calculate the square root of the right side: 3.535533906

Break this problem into two subproblems by setting 
(p + 3) equal to 3.535533906 and -3.535533906.

Subproblem 1

p + 3 = 3.535533906 Simplifying p + 3 = 3.535533906 Reorder the terms: 3 + p = 3.535533906 Solving 3 + p = 3.535533906 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + p = 3.535533906 + -3 Combine like terms: 3 + -3 = 0 0 + p = 3.535533906 + -3 p = 3.535533906 + -3 Combine like terms: 3.535533906 + -3 = 0.535533906 p = 0.535533906 Simplifying p = 0.535533906

Subproblem 2

p + 3 = -3.535533906 Simplifying p + 3 = -3.535533906 Reorder the terms: 3 + p = -3.535533906 Solving 3 + p = -3.535533906 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + p = -3.535533906 + -3 Combine like terms: 3 + -3 = 0 0 + p = -3.535533906 + -3 p = -3.535533906 + -3 Combine like terms: -3.535533906 + -3 = -6.535533906 p = -6.535533906 Simplifying p = -6.535533906

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.535533906, -6.535533906}

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