4x(x-5)=5x+1

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Solution for 4x(x-5)=5x+1 equation:


Simplifying
4x(x + -5) = 5x + 1

Reorder the terms:
4x(-5 + x) = 5x + 1
(-5 * 4x + x * 4x) = 5x + 1
(-20x + 4x2) = 5x + 1

Reorder the terms:
-20x + 4x2 = 1 + 5x

Solving
-20x + 4x2 = 1 + 5x

Solving for variable 'x'.

Reorder the terms:
-1 + -20x + -5x + 4x2 = 1 + 5x + -1 + -5x

Combine like terms: -20x + -5x = -25x
-1 + -25x + 4x2 = 1 + 5x + -1 + -5x

Reorder the terms:
-1 + -25x + 4x2 = 1 + -1 + 5x + -5x

Combine like terms: 1 + -1 = 0
-1 + -25x + 4x2 = 0 + 5x + -5x
-1 + -25x + 4x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-1 + -25x + 4x2 = 0

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

Divide each side by '4'.
-0.25 + -6.25x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -6.25x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -6.25x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -6.25x + x2 = 0 + 0.25
-6.25x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-6.25x + x2 = 0.25

The x term is -6.25x.  Take half its coefficient (-3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
-6.25x + 9.765625 + x2 = 0.25 + 9.765625

Reorder the terms:
9.765625 + -6.25x + x2 = 0.25 + 9.765625

Combine like terms: 0.25 + 9.765625 = 10.015625
9.765625 + -6.25x + x2 = 10.015625

Factor a perfect square on the left side:
(x + -3.125)(x + -3.125) = 10.015625

Calculate the square root of the right side: 3.164747225

Break this problem into two subproblems by setting 
(x + -3.125) equal to 3.164747225 and -3.164747225.

Subproblem 1

x + -3.125 = 3.164747225 Simplifying x + -3.125 = 3.164747225 Reorder the terms: -3.125 + x = 3.164747225 Solving -3.125 + x = 3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = 3.164747225 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = 3.164747225 + 3.125 x = 3.164747225 + 3.125 Combine like terms: 3.164747225 + 3.125 = 6.289747225 x = 6.289747225 Simplifying x = 6.289747225

Subproblem 2

x + -3.125 = -3.164747225 Simplifying x + -3.125 = -3.164747225 Reorder the terms: -3.125 + x = -3.164747225 Solving -3.125 + x = -3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = -3.164747225 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = -3.164747225 + 3.125 x = -3.164747225 + 3.125 Combine like terms: -3.164747225 + 3.125 = -0.039747225 x = -0.039747225 Simplifying x = -0.039747225

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.289747225, -0.039747225}

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