1.875=10(p)(1-p)

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Solution for 1.875=10(p)(1-p) equation:


Simplifying
1.875 = 10(p)(1 + -1p)
1.875 = (1 * 10p + -1p * 10p)
1.875 = (10p + -10p2)

Solving
1.875 = 10p + -10p2

Solving for variable 'p'.

Reorder the terms:
1.875 + -10p + 10p2 = 10p + -10p + -10p2 + 10p2

Combine like terms: 10p + -10p = 0
1.875 + -10p + 10p2 = 0 + -10p2 + 10p2
1.875 + -10p + 10p2 = -10p2 + 10p2

Combine like terms: -10p2 + 10p2 = 0
1.875 + -10p + 10p2 = 0

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

Divide each side by '10'.
0.1875 + -1p + p2 = 0

Move the constant term to the right:

Add '-0.1875' to each side of the equation.
0.1875 + -1p + -0.1875 + p2 = 0 + -0.1875

Reorder the terms:
0.1875 + -0.1875 + -1p + p2 = 0 + -0.1875

Combine like terms: 0.1875 + -0.1875 = 0.0000
0.0000 + -1p + p2 = 0 + -0.1875
-1p + p2 = 0 + -0.1875

Combine like terms: 0 + -0.1875 = -0.1875
-1p + p2 = -0.1875

The p term is -1p.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1p + 0.25 + p2 = -0.1875 + 0.25

Reorder the terms:
0.25 + -1p + p2 = -0.1875 + 0.25

Combine like terms: -0.1875 + 0.25 = 0.0625
0.25 + -1p + p2 = 0.0625

Factor a perfect square on the left side:
(p + -0.5)(p + -0.5) = 0.0625

Calculate the square root of the right side: 0.25

Break this problem into two subproblems by setting 
(p + -0.5) equal to 0.25 and -0.25.

Subproblem 1

p + -0.5 = 0.25 Simplifying p + -0.5 = 0.25 Reorder the terms: -0.5 + p = 0.25 Solving -0.5 + p = 0.25 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + p = 0.25 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + p = 0.25 + 0.5 p = 0.25 + 0.5 Combine like terms: 0.25 + 0.5 = 0.75 p = 0.75 Simplifying p = 0.75

Subproblem 2

p + -0.5 = -0.25 Simplifying p + -0.5 = -0.25 Reorder the terms: -0.5 + p = -0.25 Solving -0.5 + p = -0.25 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + p = -0.25 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + p = -0.25 + 0.5 p = -0.25 + 0.5 Combine like terms: -0.25 + 0.5 = 0.25 p = 0.25 Simplifying p = 0.25

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.75, 0.25}

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