130x-4x^2+425=0

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Solution for 130x-4x^2+425=0 equation:


Simplifying
130x + -4x2 + 425 = 0

Reorder the terms:
425 + 130x + -4x2 = 0

Solving
425 + 130x + -4x2 = 0

Solving for variable 'x'.

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

Divide each side by '-4'.
-106.25 + -32.5x + x2 = 0

Move the constant term to the right:

Add '106.25' to each side of the equation.
-106.25 + -32.5x + 106.25 + x2 = 0 + 106.25

Reorder the terms:
-106.25 + 106.25 + -32.5x + x2 = 0 + 106.25

Combine like terms: -106.25 + 106.25 = 0.00
0.00 + -32.5x + x2 = 0 + 106.25
-32.5x + x2 = 0 + 106.25

Combine like terms: 0 + 106.25 = 106.25
-32.5x + x2 = 106.25

The x term is -32.5x.  Take half its coefficient (-16.25).
Square it (264.0625) and add it to both sides.

Add '264.0625' to each side of the equation.
-32.5x + 264.0625 + x2 = 106.25 + 264.0625

Reorder the terms:
264.0625 + -32.5x + x2 = 106.25 + 264.0625

Combine like terms: 106.25 + 264.0625 = 370.3125
264.0625 + -32.5x + x2 = 370.3125

Factor a perfect square on the left side:
(x + -16.25)(x + -16.25) = 370.3125

Calculate the square root of the right side: 19.243505398

Break this problem into two subproblems by setting 
(x + -16.25) equal to 19.243505398 and -19.243505398.

Subproblem 1

x + -16.25 = 19.243505398 Simplifying x + -16.25 = 19.243505398 Reorder the terms: -16.25 + x = 19.243505398 Solving -16.25 + x = 19.243505398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16.25' to each side of the equation. -16.25 + 16.25 + x = 19.243505398 + 16.25 Combine like terms: -16.25 + 16.25 = 0.00 0.00 + x = 19.243505398 + 16.25 x = 19.243505398 + 16.25 Combine like terms: 19.243505398 + 16.25 = 35.493505398 x = 35.493505398 Simplifying x = 35.493505398

Subproblem 2

x + -16.25 = -19.243505398 Simplifying x + -16.25 = -19.243505398 Reorder the terms: -16.25 + x = -19.243505398 Solving -16.25 + x = -19.243505398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16.25' to each side of the equation. -16.25 + 16.25 + x = -19.243505398 + 16.25 Combine like terms: -16.25 + 16.25 = 0.00 0.00 + x = -19.243505398 + 16.25 x = -19.243505398 + 16.25 Combine like terms: -19.243505398 + 16.25 = -2.993505398 x = -2.993505398 Simplifying x = -2.993505398

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.493505398, -2.993505398}

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