-7p^2+p+5=0

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Solution for -7p^2+p+5=0 equation:


Simplifying
-7p2 + p + 5 = 0

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

Solving
5 + p + -7p2 = 0

Solving for variable 'p'.

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-0.7142857143 + -0.1428571429p + p2 = 0

Move the constant term to the right:

Add '0.7142857143' to each side of the equation.
-0.7142857143 + -0.1428571429p + 0.7142857143 + p2 = 0 + 0.7142857143

Reorder the terms:
-0.7142857143 + 0.7142857143 + -0.1428571429p + p2 = 0 + 0.7142857143

Combine like terms: -0.7142857143 + 0.7142857143 = 0.0000000000
0.0000000000 + -0.1428571429p + p2 = 0 + 0.7142857143
-0.1428571429p + p2 = 0 + 0.7142857143

Combine like terms: 0 + 0.7142857143 = 0.7142857143
-0.1428571429p + p2 = 0.7142857143

The p term is p.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-0.1428571429p + 0.25 + p2 = 0.7142857143 + 0.25

Reorder the terms:
0.25 + -0.1428571429p + p2 = 0.7142857143 + 0.25

Combine like terms: 0.7142857143 + 0.25 = 0.9642857143
0.25 + -0.1428571429p + p2 = 0.9642857143

Factor a perfect square on the left side:
(p + 0.5)(p + 0.5) = 0.9642857143

Calculate the square root of the right side: 0.981980506

Break this problem into two subproblems by setting 
(p + 0.5) equal to 0.981980506 and -0.981980506.

Subproblem 1

p + 0.5 = 0.981980506 Simplifying p + 0.5 = 0.981980506 Reorder the terms: 0.5 + p = 0.981980506 Solving 0.5 + p = 0.981980506 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + p = 0.981980506 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = 0.981980506 + -0.5 p = 0.981980506 + -0.5 Combine like terms: 0.981980506 + -0.5 = 0.481980506 p = 0.481980506 Simplifying p = 0.481980506

Subproblem 2

p + 0.5 = -0.981980506 Simplifying p + 0.5 = -0.981980506 Reorder the terms: 0.5 + p = -0.981980506 Solving 0.5 + p = -0.981980506 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + p = -0.981980506 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = -0.981980506 + -0.5 p = -0.981980506 + -0.5 Combine like terms: -0.981980506 + -0.5 = -1.481980506 p = -1.481980506 Simplifying p = -1.481980506

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.481980506, -1.481980506}

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