5p^2-9p-10=0

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Solution for 5p^2-9p-10=0 equation:


Simplifying
5p2 + -9p + -10 = 0

Reorder the terms:
-10 + -9p + 5p2 = 0

Solving
-10 + -9p + 5p2 = 0

Solving for variable 'p'.

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

Divide each side by '5'.
-2 + -1.8p + p2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -1.8p + 2 + p2 = 0 + 2

Reorder the terms:
-2 + 2 + -1.8p + p2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1.8p + p2 = 0 + 2
-1.8p + p2 = 0 + 2

Combine like terms: 0 + 2 = 2
-1.8p + p2 = 2

The p term is -1.8p.  Take half its coefficient (-0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
-1.8p + 0.81 + p2 = 2 + 0.81

Reorder the terms:
0.81 + -1.8p + p2 = 2 + 0.81

Combine like terms: 2 + 0.81 = 2.81
0.81 + -1.8p + p2 = 2.81

Factor a perfect square on the left side:
(p + -0.9)(p + -0.9) = 2.81

Calculate the square root of the right side: 1.676305461

Break this problem into two subproblems by setting 
(p + -0.9) equal to 1.676305461 and -1.676305461.

Subproblem 1

p + -0.9 = 1.676305461 Simplifying p + -0.9 = 1.676305461 Reorder the terms: -0.9 + p = 1.676305461 Solving -0.9 + p = 1.676305461 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + p = 1.676305461 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + p = 1.676305461 + 0.9 p = 1.676305461 + 0.9 Combine like terms: 1.676305461 + 0.9 = 2.576305461 p = 2.576305461 Simplifying p = 2.576305461

Subproblem 2

p + -0.9 = -1.676305461 Simplifying p + -0.9 = -1.676305461 Reorder the terms: -0.9 + p = -1.676305461 Solving -0.9 + p = -1.676305461 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + p = -1.676305461 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + p = -1.676305461 + 0.9 p = -1.676305461 + 0.9 Combine like terms: -1.676305461 + 0.9 = -0.776305461 p = -0.776305461 Simplifying p = -0.776305461

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.576305461, -0.776305461}

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