-2p(p-5)+7p=-5

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Solution for -2p(p-5)+7p=-5 equation:


Simplifying
-2p(p + -5) + 7p = -5

Reorder the terms:
-2p(-5 + p) + 7p = -5
(-5 * -2p + p * -2p) + 7p = -5
(10p + -2p2) + 7p = -5

Reorder the terms:
10p + 7p + -2p2 = -5

Combine like terms: 10p + 7p = 17p
17p + -2p2 = -5

Solving
17p + -2p2 = -5

Solving for variable 'p'.

Reorder the terms:
5 + 17p + -2p2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 17p + -2p2 = 0

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

Divide each side by '-2'.
-2.5 + -8.5p + p2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -8.5p + 2.5 + p2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -8.5p + p2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -8.5p + p2 = 0 + 2.5
-8.5p + p2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-8.5p + p2 = 2.5

The p term is -8.5p.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5p + 18.0625 + p2 = 2.5 + 18.0625

Reorder the terms:
18.0625 + -8.5p + p2 = 2.5 + 18.0625

Combine like terms: 2.5 + 18.0625 = 20.5625
18.0625 + -8.5p + p2 = 20.5625

Factor a perfect square on the left side:
(p + -4.25)(p + -4.25) = 20.5625

Calculate the square root of the right side: 4.534589287

Break this problem into two subproblems by setting 
(p + -4.25) equal to 4.534589287 and -4.534589287.

Subproblem 1

p + -4.25 = 4.534589287 Simplifying p + -4.25 = 4.534589287 Reorder the terms: -4.25 + p = 4.534589287 Solving -4.25 + p = 4.534589287 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + p = 4.534589287 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + p = 4.534589287 + 4.25 p = 4.534589287 + 4.25 Combine like terms: 4.534589287 + 4.25 = 8.784589287 p = 8.784589287 Simplifying p = 8.784589287

Subproblem 2

p + -4.25 = -4.534589287 Simplifying p + -4.25 = -4.534589287 Reorder the terms: -4.25 + p = -4.534589287 Solving -4.25 + p = -4.534589287 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + p = -4.534589287 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + p = -4.534589287 + 4.25 p = -4.534589287 + 4.25 Combine like terms: -4.534589287 + 4.25 = -0.284589287 p = -0.284589287 Simplifying p = -0.284589287

Solution

The solution to the problem is based on the solutions from the subproblems. p = {8.784589287, -0.284589287}

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