5p^2-4=-5p

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Solution for 5p^2-4=-5p equation:


Simplifying
5p2 + -4 = -5p

Reorder the terms:
-4 + 5p2 = -5p

Solving
-4 + 5p2 = -5p

Solving for variable 'p'.

Reorder the terms:
-4 + 5p + 5p2 = -5p + 5p

Combine like terms: -5p + 5p = 0
-4 + 5p + 5p2 = 0

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

Divide each side by '5'.
-0.8 + p + p2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + p + 0.8 + p2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + p + p2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + p + p2 = 0 + 0.8
p + p2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
p + p2 = 0.8

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.
 + 0.25 + p2 = 0.8 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + p2 = 0.8 + 0.25

Combine like terms: 0.8 + 0.25 = 1.05
1.25 + p2 = 1.05

Factor a perfect square on the left side:
(p + 0.5)(p + 0.5) = 1.05

Calculate the square root of the right side: 1.024695077

Break this problem into two subproblems by setting 
(p + 0.5) equal to 1.024695077 and -1.024695077.

Subproblem 1

p + 0.5 = 1.024695077 Simplifying p + 0.5 = 1.024695077 Reorder the terms: 0.5 + p = 1.024695077 Solving 0.5 + p = 1.024695077 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 = 1.024695077 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = 1.024695077 + -0.5 p = 1.024695077 + -0.5 Combine like terms: 1.024695077 + -0.5 = 0.524695077 p = 0.524695077 Simplifying p = 0.524695077

Subproblem 2

p + 0.5 = -1.024695077 Simplifying p + 0.5 = -1.024695077 Reorder the terms: 0.5 + p = -1.024695077 Solving 0.5 + p = -1.024695077 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 = -1.024695077 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = -1.024695077 + -0.5 p = -1.024695077 + -0.5 Combine like terms: -1.024695077 + -0.5 = -1.524695077 p = -1.524695077 Simplifying p = -1.524695077

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.524695077, -1.524695077}

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