x^2+6.5x+10=0

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Solution for x^2+6.5x+10=0 equation:


Simplifying
x2 + 6.5x + 10 = 0

Reorder the terms:
10 + 6.5x + x2 = 0

Solving
10 + 6.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + 6.5x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + 6.5x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 6.5x + x2 = 0 + -10
6.5x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
6.5x + x2 = -10

The x term is 6.5x.  Take half its coefficient (3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
6.5x + 10.5625 + x2 = -10 + 10.5625

Reorder the terms:
10.5625 + 6.5x + x2 = -10 + 10.5625

Combine like terms: -10 + 10.5625 = 0.5625
10.5625 + 6.5x + x2 = 0.5625

Factor a perfect square on the left side:
(x + 3.25)(x + 3.25) = 0.5625

Calculate the square root of the right side: 0.75

Break this problem into two subproblems by setting 
(x + 3.25) equal to 0.75 and -0.75.

Subproblem 1

x + 3.25 = 0.75 Simplifying x + 3.25 = 0.75 Reorder the terms: 3.25 + x = 0.75 Solving 3.25 + x = 0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = 0.75 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = 0.75 + -3.25 x = 0.75 + -3.25 Combine like terms: 0.75 + -3.25 = -2.5 x = -2.5 Simplifying x = -2.5

Subproblem 2

x + 3.25 = -0.75 Simplifying x + 3.25 = -0.75 Reorder the terms: 3.25 + x = -0.75 Solving 3.25 + x = -0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = -0.75 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = -0.75 + -3.25 x = -0.75 + -3.25 Combine like terms: -0.75 + -3.25 = -4 x = -4 Simplifying x = -4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.5, -4}

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