4x^2-20x+25=60

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Solution for 4x^2-20x+25=60 equation:


Simplifying
4x2 + -20x + 25 = 60

Reorder the terms:
25 + -20x + 4x2 = 60

Solving
25 + -20x + 4x2 = 60

Solving for variable 'x'.

Reorder the terms:
25 + -60 + -20x + 4x2 = 60 + -60

Combine like terms: 25 + -60 = -35
-35 + -20x + 4x2 = 60 + -60

Combine like terms: 60 + -60 = 0
-35 + -20x + 4x2 = 0

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

Divide each side by '4'.
-8.75 + -5x + x2 = 0

Move the constant term to the right:

Add '8.75' to each side of the equation.
-8.75 + -5x + 8.75 + x2 = 0 + 8.75

Reorder the terms:
-8.75 + 8.75 + -5x + x2 = 0 + 8.75

Combine like terms: -8.75 + 8.75 = 0.00
0.00 + -5x + x2 = 0 + 8.75
-5x + x2 = 0 + 8.75

Combine like terms: 0 + 8.75 = 8.75
-5x + x2 = 8.75

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 8.75 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 8.75 + 6.25

Combine like terms: 8.75 + 6.25 = 15
6.25 + -5x + x2 = 15

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(x + -2.5) equal to 3.872983346 and -3.872983346.

Subproblem 1

x + -2.5 = 3.872983346 Simplifying x + -2.5 = 3.872983346 Reorder the terms: -2.5 + x = 3.872983346 Solving -2.5 + x = 3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 3.872983346 + 2.5 x = 3.872983346 + 2.5 Combine like terms: 3.872983346 + 2.5 = 6.372983346 x = 6.372983346 Simplifying x = 6.372983346

Subproblem 2

x + -2.5 = -3.872983346 Simplifying x + -2.5 = -3.872983346 Reorder the terms: -2.5 + x = -3.872983346 Solving -2.5 + x = -3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -3.872983346 + 2.5 x = -3.872983346 + 2.5 Combine like terms: -3.872983346 + 2.5 = -1.372983346 x = -1.372983346 Simplifying x = -1.372983346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.372983346, -1.372983346}

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