(x-.25)(x+6)=0

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Solution for (x-.25)(x+6)=0 equation:


Simplifying
(x + -0.25)(x + 6) = 0

Reorder the terms:
(-0.25 + x)(x + 6) = 0

Reorder the terms:
(-0.25 + x)(6 + x) = 0

Multiply (-0.25 + x) * (6 + x)
(-0.25(6 + x) + x(6 + x)) = 0
((6 * -0.25 + x * -0.25) + x(6 + x)) = 0
((-1.5 + -0.25x) + x(6 + x)) = 0
(-1.5 + -0.25x + (6 * x + x * x)) = 0
(-1.5 + -0.25x + (6x + x2)) = 0

Combine like terms: -0.25x + 6x = 5.75x
(-1.5 + 5.75x + x2) = 0

Solving
-1.5 + 5.75x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 5.75x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 5.75x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 5.75x + x2 = 0 + 1.5
5.75x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
5.75x + x2 = 1.5

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 1.5 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 1.5 + 8.265625

Combine like terms: 1.5 + 8.265625 = 9.765625
8.265625 + 5.75x + x2 = 9.765625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 9.765625

Calculate the square root of the right side: 3.125

Break this problem into two subproblems by setting 
(x + 2.875) equal to 3.125 and -3.125.

Subproblem 1

x + 2.875 = 3.125 Simplifying x + 2.875 = 3.125 Reorder the terms: 2.875 + x = 3.125 Solving 2.875 + x = 3.125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 3.125 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 3.125 + -2.875 x = 3.125 + -2.875 Combine like terms: 3.125 + -2.875 = 0.25 x = 0.25 Simplifying x = 0.25

Subproblem 2

x + 2.875 = -3.125 Simplifying x + 2.875 = -3.125 Reorder the terms: 2.875 + x = -3.125 Solving 2.875 + x = -3.125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -3.125 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -3.125 + -2.875 x = -3.125 + -2.875 Combine like terms: -3.125 + -2.875 = -6 x = -6 Simplifying x = -6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.25, -6}

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