x^2-8.8x+7=0

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Solution for x^2-8.8x+7=0 equation:


Simplifying
x2 + -8.8x + 7 = 0

Reorder the terms:
7 + -8.8x + x2 = 0

Solving
7 + -8.8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -8.8x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -8.8x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -8.8x + x2 = 0 + -7
-8.8x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-8.8x + x2 = -7

The x term is -8.8x.  Take half its coefficient (-4.4).
Square it (19.36) and add it to both sides.

Add '19.36' to each side of the equation.
-8.8x + 19.36 + x2 = -7 + 19.36

Reorder the terms:
19.36 + -8.8x + x2 = -7 + 19.36

Combine like terms: -7 + 19.36 = 12.36
19.36 + -8.8x + x2 = 12.36

Factor a perfect square on the left side:
(x + -4.4)(x + -4.4) = 12.36

Calculate the square root of the right side: 3.515679166

Break this problem into two subproblems by setting 
(x + -4.4) equal to 3.515679166 and -3.515679166.

Subproblem 1

x + -4.4 = 3.515679166 Simplifying x + -4.4 = 3.515679166 Reorder the terms: -4.4 + x = 3.515679166 Solving -4.4 + x = 3.515679166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.4' to each side of the equation. -4.4 + 4.4 + x = 3.515679166 + 4.4 Combine like terms: -4.4 + 4.4 = 0.0 0.0 + x = 3.515679166 + 4.4 x = 3.515679166 + 4.4 Combine like terms: 3.515679166 + 4.4 = 7.915679166 x = 7.915679166 Simplifying x = 7.915679166

Subproblem 2

x + -4.4 = -3.515679166 Simplifying x + -4.4 = -3.515679166 Reorder the terms: -4.4 + x = -3.515679166 Solving -4.4 + x = -3.515679166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.4' to each side of the equation. -4.4 + 4.4 + x = -3.515679166 + 4.4 Combine like terms: -4.4 + 4.4 = 0.0 0.0 + x = -3.515679166 + 4.4 x = -3.515679166 + 4.4 Combine like terms: -3.515679166 + 4.4 = 0.884320834 x = 0.884320834 Simplifying x = 0.884320834

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.915679166, 0.884320834}

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