x^2-10x-2=9x+4

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Solution for x^2-10x-2=9x+4 equation:


Simplifying
x2 + -10x + -2 = 9x + 4

Reorder the terms:
-2 + -10x + x2 = 9x + 4

Reorder the terms:
-2 + -10x + x2 = 4 + 9x

Solving
-2 + -10x + x2 = 4 + 9x

Solving for variable 'x'.

Reorder the terms:
-2 + -4 + -10x + -9x + x2 = 4 + 9x + -4 + -9x

Combine like terms: -2 + -4 = -6
-6 + -10x + -9x + x2 = 4 + 9x + -4 + -9x

Combine like terms: -10x + -9x = -19x
-6 + -19x + x2 = 4 + 9x + -4 + -9x

Reorder the terms:
-6 + -19x + x2 = 4 + -4 + 9x + -9x

Combine like terms: 4 + -4 = 0
-6 + -19x + x2 = 0 + 9x + -9x
-6 + -19x + x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-6 + -19x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -19x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -19x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -19x + x2 = 0 + 6
-19x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-19x + x2 = 6

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = 6 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 6 + 90.25

Combine like terms: 6 + 90.25 = 96.25
90.25 + -19x + x2 = 96.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 96.25

Calculate the square root of the right side: 9.810708435

Break this problem into two subproblems by setting 
(x + -9.5) equal to 9.810708435 and -9.810708435.

Subproblem 1

x + -9.5 = 9.810708435 Simplifying x + -9.5 = 9.810708435 Reorder the terms: -9.5 + x = 9.810708435 Solving -9.5 + x = 9.810708435 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 9.810708435 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 9.810708435 + 9.5 x = 9.810708435 + 9.5 Combine like terms: 9.810708435 + 9.5 = 19.310708435 x = 19.310708435 Simplifying x = 19.310708435

Subproblem 2

x + -9.5 = -9.810708435 Simplifying x + -9.5 = -9.810708435 Reorder the terms: -9.5 + x = -9.810708435 Solving -9.5 + x = -9.810708435 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -9.810708435 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -9.810708435 + 9.5 x = -9.810708435 + 9.5 Combine like terms: -9.810708435 + 9.5 = -0.310708435 x = -0.310708435 Simplifying x = -0.310708435

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.310708435, -0.310708435}

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