25Q^2=2Q+1

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Solution for 25Q^2=2Q+1 equation:


Simplifying
25Q2 = 2Q + 1

Reorder the terms:
25Q2 = 1 + 2Q

Solving
25Q2 = 1 + 2Q

Solving for variable 'Q'.

Reorder the terms:
-1 + -2Q + 25Q2 = 1 + 2Q + -1 + -2Q

Reorder the terms:
-1 + -2Q + 25Q2 = 1 + -1 + 2Q + -2Q

Combine like terms: 1 + -1 = 0
-1 + -2Q + 25Q2 = 0 + 2Q + -2Q
-1 + -2Q + 25Q2 = 2Q + -2Q

Combine like terms: 2Q + -2Q = 0
-1 + -2Q + 25Q2 = 0

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

Divide each side by '25'.
-0.04 + -0.08Q + Q2 = 0

Move the constant term to the right:

Add '0.04' to each side of the equation.
-0.04 + -0.08Q + 0.04 + Q2 = 0 + 0.04

Reorder the terms:
-0.04 + 0.04 + -0.08Q + Q2 = 0 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + -0.08Q + Q2 = 0 + 0.04
-0.08Q + Q2 = 0 + 0.04

Combine like terms: 0 + 0.04 = 0.04
-0.08Q + Q2 = 0.04

The Q term is -0.08Q.  Take half its coefficient (-0.04).
Square it (0.0016) and add it to both sides.

Add '0.0016' to each side of the equation.
-0.08Q + 0.0016 + Q2 = 0.04 + 0.0016

Reorder the terms:
0.0016 + -0.08Q + Q2 = 0.04 + 0.0016

Combine like terms: 0.04 + 0.0016 = 0.0416
0.0016 + -0.08Q + Q2 = 0.0416

Factor a perfect square on the left side:
(Q + -0.04)(Q + -0.04) = 0.0416

Calculate the square root of the right side: 0.203960781

Break this problem into two subproblems by setting 
(Q + -0.04) equal to 0.203960781 and -0.203960781.

Subproblem 1

Q + -0.04 = 0.203960781 Simplifying Q + -0.04 = 0.203960781 Reorder the terms: -0.04 + Q = 0.203960781 Solving -0.04 + Q = 0.203960781 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '0.04' to each side of the equation. -0.04 + 0.04 + Q = 0.203960781 + 0.04 Combine like terms: -0.04 + 0.04 = 0.00 0.00 + Q = 0.203960781 + 0.04 Q = 0.203960781 + 0.04 Combine like terms: 0.203960781 + 0.04 = 0.243960781 Q = 0.243960781 Simplifying Q = 0.243960781

Subproblem 2

Q + -0.04 = -0.203960781 Simplifying Q + -0.04 = -0.203960781 Reorder the terms: -0.04 + Q = -0.203960781 Solving -0.04 + Q = -0.203960781 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '0.04' to each side of the equation. -0.04 + 0.04 + Q = -0.203960781 + 0.04 Combine like terms: -0.04 + 0.04 = 0.00 0.00 + Q = -0.203960781 + 0.04 Q = -0.203960781 + 0.04 Combine like terms: -0.203960781 + 0.04 = -0.163960781 Q = -0.163960781 Simplifying Q = -0.163960781

Solution

The solution to the problem is based on the solutions from the subproblems. Q = {0.243960781, -0.163960781}

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