x^2+.76x=.988

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Solution for x^2+.76x=.988 equation:


Simplifying
x2 + 0.76x = 0.988

Reorder the terms:
0.76x + x2 = 0.988

Solving
0.76x + x2 = 0.988

Solving for variable 'x'.

Reorder the terms:
-0.988 + 0.76x + x2 = 0.988 + -0.988

Combine like terms: 0.988 + -0.988 = 0.000
-0.988 + 0.76x + x2 = 0.000

Begin completing the square.

Move the constant term to the right:

Add '0.988' to each side of the equation.
-0.988 + 0.76x + 0.988 + x2 = 0.000 + 0.988

Reorder the terms:
-0.988 + 0.988 + 0.76x + x2 = 0.000 + 0.988

Combine like terms: -0.988 + 0.988 = 0.000
0.000 + 0.76x + x2 = 0.000 + 0.988
0.76x + x2 = 0.000 + 0.988

Combine like terms: 0.000 + 0.988 = 0.988
0.76x + x2 = 0.988

The x term is 0.76x.  Take half its coefficient (0.38).
Square it (0.1444) and add it to both sides.

Add '0.1444' to each side of the equation.
0.76x + 0.1444 + x2 = 0.988 + 0.1444

Reorder the terms:
0.1444 + 0.76x + x2 = 0.988 + 0.1444

Combine like terms: 0.988 + 0.1444 = 1.1324
0.1444 + 0.76x + x2 = 1.1324

Factor a perfect square on the left side:
(x + 0.38)(x + 0.38) = 1.1324

Calculate the square root of the right side: 1.064142848

Break this problem into two subproblems by setting 
(x + 0.38) equal to 1.064142848 and -1.064142848.

Subproblem 1

x + 0.38 = 1.064142848 Simplifying x + 0.38 = 1.064142848 Reorder the terms: 0.38 + x = 1.064142848 Solving 0.38 + x = 1.064142848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.38' to each side of the equation. 0.38 + -0.38 + x = 1.064142848 + -0.38 Combine like terms: 0.38 + -0.38 = 0.00 0.00 + x = 1.064142848 + -0.38 x = 1.064142848 + -0.38 Combine like terms: 1.064142848 + -0.38 = 0.684142848 x = 0.684142848 Simplifying x = 0.684142848

Subproblem 2

x + 0.38 = -1.064142848 Simplifying x + 0.38 = -1.064142848 Reorder the terms: 0.38 + x = -1.064142848 Solving 0.38 + x = -1.064142848 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.38' to each side of the equation. 0.38 + -0.38 + x = -1.064142848 + -0.38 Combine like terms: 0.38 + -0.38 = 0.00 0.00 + x = -1.064142848 + -0.38 x = -1.064142848 + -0.38 Combine like terms: -1.064142848 + -0.38 = -1.444142848 x = -1.444142848 Simplifying x = -1.444142848

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.684142848, -1.444142848}

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