12*x^2-202.8*x+623.7=0

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Solution for 12*x^2-202.8*x+623.7=0 equation:


Simplifying
12x2 + -202.8x + 623.7 = 0

Reorder the terms:
623.7 + -202.8x + 12x2 = 0

Solving
623.7 + -202.8x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
51.975 + -16.9x + x2 = 0

Move the constant term to the right:

Add '-51.975' to each side of the equation.
51.975 + -16.9x + -51.975 + x2 = 0 + -51.975

Reorder the terms:
51.975 + -51.975 + -16.9x + x2 = 0 + -51.975

Combine like terms: 51.975 + -51.975 = 0.000
0.000 + -16.9x + x2 = 0 + -51.975
-16.9x + x2 = 0 + -51.975

Combine like terms: 0 + -51.975 = -51.975
-16.9x + x2 = -51.975

The x term is -16.9x.  Take half its coefficient (-8.45).
Square it (71.4025) and add it to both sides.

Add '71.4025' to each side of the equation.
-16.9x + 71.4025 + x2 = -51.975 + 71.4025

Reorder the terms:
71.4025 + -16.9x + x2 = -51.975 + 71.4025

Combine like terms: -51.975 + 71.4025 = 19.4275
71.4025 + -16.9x + x2 = 19.4275

Factor a perfect square on the left side:
(x + -8.45)(x + -8.45) = 19.4275

Calculate the square root of the right side: 4.40766378

Break this problem into two subproblems by setting 
(x + -8.45) equal to 4.40766378 and -4.40766378.

Subproblem 1

x + -8.45 = 4.40766378 Simplifying x + -8.45 = 4.40766378 Reorder the terms: -8.45 + x = 4.40766378 Solving -8.45 + x = 4.40766378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.45' to each side of the equation. -8.45 + 8.45 + x = 4.40766378 + 8.45 Combine like terms: -8.45 + 8.45 = 0.00 0.00 + x = 4.40766378 + 8.45 x = 4.40766378 + 8.45 Combine like terms: 4.40766378 + 8.45 = 12.85766378 x = 12.85766378 Simplifying x = 12.85766378

Subproblem 2

x + -8.45 = -4.40766378 Simplifying x + -8.45 = -4.40766378 Reorder the terms: -8.45 + x = -4.40766378 Solving -8.45 + x = -4.40766378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.45' to each side of the equation. -8.45 + 8.45 + x = -4.40766378 + 8.45 Combine like terms: -8.45 + 8.45 = 0.00 0.00 + x = -4.40766378 + 8.45 x = -4.40766378 + 8.45 Combine like terms: -4.40766378 + 8.45 = 4.04233622 x = 4.04233622 Simplifying x = 4.04233622

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.85766378, 4.04233622}

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