x^2+5x+6.25=61.25

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Solution for x^2+5x+6.25=61.25 equation:


Simplifying
x2 + 5x + 6.25 = 61.25

Reorder the terms:
6.25 + 5x + x2 = 61.25

Solving
6.25 + 5x + x2 = 61.25

Solving for variable 'x'.

Reorder the terms:
6.25 + -61.25 + 5x + x2 = 61.25 + -61.25

Combine like terms: 6.25 + -61.25 = -55
-55 + 5x + x2 = 61.25 + -61.25

Combine like terms: 61.25 + -61.25 = 0.00
-55 + 5x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + 5x + 55 + x2 = 0.00 + 55

Reorder the terms:
-55 + 55 + 5x + x2 = 0.00 + 55

Combine like terms: -55 + 55 = 0
0 + 5x + x2 = 0.00 + 55
5x + x2 = 0.00 + 55

Combine like terms: 0.00 + 55 = 55
5x + x2 = 55

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 = 55 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 55 + 6.25

Combine like terms: 55 + 6.25 = 61.25
6.25 + 5x + x2 = 61.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 61.25

Calculate the square root of the right side: 7.826237921

Break this problem into two subproblems by setting 
(x + 2.5) equal to 7.826237921 and -7.826237921.

Subproblem 1

x + 2.5 = 7.826237921 Simplifying x + 2.5 = 7.826237921 Reorder the terms: 2.5 + x = 7.826237921 Solving 2.5 + x = 7.826237921 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 = 7.826237921 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 7.826237921 + -2.5 x = 7.826237921 + -2.5 Combine like terms: 7.826237921 + -2.5 = 5.326237921 x = 5.326237921 Simplifying x = 5.326237921

Subproblem 2

x + 2.5 = -7.826237921 Simplifying x + 2.5 = -7.826237921 Reorder the terms: 2.5 + x = -7.826237921 Solving 2.5 + x = -7.826237921 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 = -7.826237921 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -7.826237921 + -2.5 x = -7.826237921 + -2.5 Combine like terms: -7.826237921 + -2.5 = -10.326237921 x = -10.326237921 Simplifying x = -10.326237921

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.326237921, -10.326237921}

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