x^2+.6x=.91

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Solution for x^2+.6x=.91 equation:


Simplifying
x2 + 0.6x = 0.91

Reorder the terms:
0.6x + x2 = 0.91

Solving
0.6x + x2 = 0.91

Solving for variable 'x'.

Reorder the terms:
-0.91 + 0.6x + x2 = 0.91 + -0.91

Combine like terms: 0.91 + -0.91 = 0.00
-0.91 + 0.6x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '0.91' to each side of the equation.
-0.91 + 0.6x + 0.91 + x2 = 0.00 + 0.91

Reorder the terms:
-0.91 + 0.91 + 0.6x + x2 = 0.00 + 0.91

Combine like terms: -0.91 + 0.91 = 0.00
0.00 + 0.6x + x2 = 0.00 + 0.91
0.6x + x2 = 0.00 + 0.91

Combine like terms: 0.00 + 0.91 = 0.91
0.6x + x2 = 0.91

The x term is 0.6x.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6x + 0.09 + x2 = 0.91 + 0.09

Reorder the terms:
0.09 + 0.6x + x2 = 0.91 + 0.09

Combine like terms: 0.91 + 0.09 = 1
0.09 + 0.6x + x2 = 1

Factor a perfect square on the left side:
(x + 0.3)(x + 0.3) = 1

Calculate the square root of the right side: 1

Break this problem into two subproblems by setting 
(x + 0.3) equal to 1 and -1.

Subproblem 1

x + 0.3 = 1 Simplifying x + 0.3 = 1 Reorder the terms: 0.3 + x = 1 Solving 0.3 + x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 1 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 1 + -0.3 x = 1 + -0.3 Combine like terms: 1 + -0.3 = 0.7 x = 0.7 Simplifying x = 0.7

Subproblem 2

x + 0.3 = -1 Simplifying x + 0.3 = -1 Reorder the terms: 0.3 + x = -1 Solving 0.3 + x = -1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -1 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -1 + -0.3 x = -1 + -0.3 Combine like terms: -1 + -0.3 = -1.3 x = -1.3 Simplifying x = -1.3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7, -1.3}

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