8p^2+16p-25=0

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Solution for 8p^2+16p-25=0 equation:


Simplifying
8p2 + 16p + -25 = 0

Reorder the terms:
-25 + 16p + 8p2 = 0

Solving
-25 + 16p + 8p2 = 0

Solving for variable 'p'.

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

Divide each side by '8'.
-3.125 + 2p + p2 = 0

Move the constant term to the right:

Add '3.125' to each side of the equation.
-3.125 + 2p + 3.125 + p2 = 0 + 3.125

Reorder the terms:
-3.125 + 3.125 + 2p + p2 = 0 + 3.125

Combine like terms: -3.125 + 3.125 = 0.000
0.000 + 2p + p2 = 0 + 3.125
2p + p2 = 0 + 3.125

Combine like terms: 0 + 3.125 = 3.125
2p + p2 = 3.125

The p term is 2p.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2p + 1 + p2 = 3.125 + 1

Reorder the terms:
1 + 2p + p2 = 3.125 + 1

Combine like terms: 3.125 + 1 = 4.125
1 + 2p + p2 = 4.125

Factor a perfect square on the left side:
(p + 1)(p + 1) = 4.125

Calculate the square root of the right side: 2.031009601

Break this problem into two subproblems by setting 
(p + 1) equal to 2.031009601 and -2.031009601.

Subproblem 1

p + 1 = 2.031009601 Simplifying p + 1 = 2.031009601 Reorder the terms: 1 + p = 2.031009601 Solving 1 + p = 2.031009601 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = 2.031009601 + -1 Combine like terms: 1 + -1 = 0 0 + p = 2.031009601 + -1 p = 2.031009601 + -1 Combine like terms: 2.031009601 + -1 = 1.031009601 p = 1.031009601 Simplifying p = 1.031009601

Subproblem 2

p + 1 = -2.031009601 Simplifying p + 1 = -2.031009601 Reorder the terms: 1 + p = -2.031009601 Solving 1 + p = -2.031009601 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = -2.031009601 + -1 Combine like terms: 1 + -1 = 0 0 + p = -2.031009601 + -1 p = -2.031009601 + -1 Combine like terms: -2.031009601 + -1 = -3.031009601 p = -3.031009601 Simplifying p = -3.031009601

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.031009601, -3.031009601}

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