(2p-5)(p+.75)=0

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Solution for (2p-5)(p+.75)=0 equation:


Simplifying
(2p + -5)(p + 0.75) = 0

Reorder the terms:
(-5 + 2p)(p + 0.75) = 0

Reorder the terms:
(-5 + 2p)(0.75 + p) = 0

Multiply (-5 + 2p) * (0.75 + p)
(-5(0.75 + p) + 2p * (0.75 + p)) = 0
((0.75 * -5 + p * -5) + 2p * (0.75 + p)) = 0
((-3.75 + -5p) + 2p * (0.75 + p)) = 0
(-3.75 + -5p + (0.75 * 2p + p * 2p)) = 0
(-3.75 + -5p + (1.5p + 2p2)) = 0

Combine like terms: -5p + 1.5p = -3.5p
(-3.75 + -3.5p + 2p2) = 0

Solving
-3.75 + -3.5p + 2p2 = 0

Solving for variable 'p'.

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

Divide each side by '2'.
-1.875 + -1.75p + p2 = 0

Move the constant term to the right:

Add '1.875' to each side of the equation.
-1.875 + -1.75p + 1.875 + p2 = 0 + 1.875

Reorder the terms:
-1.875 + 1.875 + -1.75p + p2 = 0 + 1.875

Combine like terms: -1.875 + 1.875 = 0.000
0.000 + -1.75p + p2 = 0 + 1.875
-1.75p + p2 = 0 + 1.875

Combine like terms: 0 + 1.875 = 1.875
-1.75p + p2 = 1.875

The p term is -1.75p.  Take half its coefficient (-0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
-1.75p + 0.765625 + p2 = 1.875 + 0.765625

Reorder the terms:
0.765625 + -1.75p + p2 = 1.875 + 0.765625

Combine like terms: 1.875 + 0.765625 = 2.640625
0.765625 + -1.75p + p2 = 2.640625

Factor a perfect square on the left side:
(p + -0.875)(p + -0.875) = 2.640625

Calculate the square root of the right side: 1.625

Break this problem into two subproblems by setting 
(p + -0.875) equal to 1.625 and -1.625.

Subproblem 1

p + -0.875 = 1.625 Simplifying p + -0.875 = 1.625 Reorder the terms: -0.875 + p = 1.625 Solving -0.875 + p = 1.625 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.875' to each side of the equation. -0.875 + 0.875 + p = 1.625 + 0.875 Combine like terms: -0.875 + 0.875 = 0.000 0.000 + p = 1.625 + 0.875 p = 1.625 + 0.875 Combine like terms: 1.625 + 0.875 = 2.5 p = 2.5 Simplifying p = 2.5

Subproblem 2

p + -0.875 = -1.625 Simplifying p + -0.875 = -1.625 Reorder the terms: -0.875 + p = -1.625 Solving -0.875 + p = -1.625 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.875' to each side of the equation. -0.875 + 0.875 + p = -1.625 + 0.875 Combine like terms: -0.875 + 0.875 = 0.000 0.000 + p = -1.625 + 0.875 p = -1.625 + 0.875 Combine like terms: -1.625 + 0.875 = -0.75 p = -0.75 Simplifying p = -0.75

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.5, -0.75}

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