9x-10=-5x^2+6

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Solution for 9x-10=-5x^2+6 equation:


Simplifying
9x + -10 = -5x2 + 6

Reorder the terms:
-10 + 9x = -5x2 + 6

Reorder the terms:
-10 + 9x = 6 + -5x2

Solving
-10 + 9x = 6 + -5x2

Solving for variable 'x'.

Reorder the terms:
-10 + -6 + 9x + 5x2 = 6 + -5x2 + -6 + 5x2

Combine like terms: -10 + -6 = -16
-16 + 9x + 5x2 = 6 + -5x2 + -6 + 5x2

Reorder the terms:
-16 + 9x + 5x2 = 6 + -6 + -5x2 + 5x2

Combine like terms: 6 + -6 = 0
-16 + 9x + 5x2 = 0 + -5x2 + 5x2
-16 + 9x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-16 + 9x + 5x2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-3.2 + 1.8x + x2 = 0

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + 1.8x + 3.2 + x2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + 1.8x + x2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + 1.8x + x2 = 0 + 3.2
1.8x + x2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
1.8x + x2 = 3.2

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 3.2 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 3.2 + 0.81

Combine like terms: 3.2 + 0.81 = 4.01
0.81 + 1.8x + x2 = 4.01

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 4.01

Calculate the square root of the right side: 2.002498439

Break this problem into two subproblems by setting 
(x + 0.9) equal to 2.002498439 and -2.002498439.

Subproblem 1

x + 0.9 = 2.002498439 Simplifying x + 0.9 = 2.002498439 Reorder the terms: 0.9 + x = 2.002498439 Solving 0.9 + x = 2.002498439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 2.002498439 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 2.002498439 + -0.9 x = 2.002498439 + -0.9 Combine like terms: 2.002498439 + -0.9 = 1.102498439 x = 1.102498439 Simplifying x = 1.102498439

Subproblem 2

x + 0.9 = -2.002498439 Simplifying x + 0.9 = -2.002498439 Reorder the terms: 0.9 + x = -2.002498439 Solving 0.9 + x = -2.002498439 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -2.002498439 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -2.002498439 + -0.9 x = -2.002498439 + -0.9 Combine like terms: -2.002498439 + -0.9 = -2.902498439 x = -2.902498439 Simplifying x = -2.902498439

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.102498439, -2.902498439}

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