8p^2+16p-25=4

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Solution for 8p^2+16p-25=4 equation:


Simplifying
8p2 + 16p + -25 = 4

Reorder the terms:
-25 + 16p + 8p2 = 4

Solving
-25 + 16p + 8p2 = 4

Solving for variable 'p'.

Reorder the terms:
-25 + -4 + 16p + 8p2 = 4 + -4

Combine like terms: -25 + -4 = -29
-29 + 16p + 8p2 = 4 + -4

Combine like terms: 4 + -4 = 0
-29 + 16p + 8p2 = 0

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

Divide each side by '8'.
-3.625 + 2p + p2 = 0

Move the constant term to the right:

Add '3.625' to each side of the equation.
-3.625 + 2p + 3.625 + p2 = 0 + 3.625

Reorder the terms:
-3.625 + 3.625 + 2p + p2 = 0 + 3.625

Combine like terms: -3.625 + 3.625 = 0.000
0.000 + 2p + p2 = 0 + 3.625
2p + p2 = 0 + 3.625

Combine like terms: 0 + 3.625 = 3.625
2p + p2 = 3.625

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 = 3.625 + 1

Reorder the terms:
1 + 2p + p2 = 3.625 + 1

Combine like terms: 3.625 + 1 = 4.625
1 + 2p + p2 = 4.625

Factor a perfect square on the left side:
(p + 1)(p + 1) = 4.625

Calculate the square root of the right side: 2.150581317

Break this problem into two subproblems by setting 
(p + 1) equal to 2.150581317 and -2.150581317.

Subproblem 1

p + 1 = 2.150581317 Simplifying p + 1 = 2.150581317 Reorder the terms: 1 + p = 2.150581317 Solving 1 + p = 2.150581317 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 = 2.150581317 + -1 Combine like terms: 1 + -1 = 0 0 + p = 2.150581317 + -1 p = 2.150581317 + -1 Combine like terms: 2.150581317 + -1 = 1.150581317 p = 1.150581317 Simplifying p = 1.150581317

Subproblem 2

p + 1 = -2.150581317 Simplifying p + 1 = -2.150581317 Reorder the terms: 1 + p = -2.150581317 Solving 1 + p = -2.150581317 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 = -2.150581317 + -1 Combine like terms: 1 + -1 = 0 0 + p = -2.150581317 + -1 p = -2.150581317 + -1 Combine like terms: -2.150581317 + -1 = -3.150581317 p = -3.150581317 Simplifying p = -3.150581317

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.150581317, -3.150581317}

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