280-39.3*x+x^2=0

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Solution for 280-39.3*x+x^2=0 equation:


Simplifying
280 + -39.3x + x2 = 0

Solving
280 + -39.3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-280' to each side of the equation.
280 + -39.3x + -280 + x2 = 0 + -280

Reorder the terms:
280 + -280 + -39.3x + x2 = 0 + -280

Combine like terms: 280 + -280 = 0
0 + -39.3x + x2 = 0 + -280
-39.3x + x2 = 0 + -280

Combine like terms: 0 + -280 = -280
-39.3x + x2 = -280

The x term is -39.3x.  Take half its coefficient (-19.65).
Square it (386.1225) and add it to both sides.

Add '386.1225' to each side of the equation.
-39.3x + 386.1225 + x2 = -280 + 386.1225

Reorder the terms:
386.1225 + -39.3x + x2 = -280 + 386.1225

Combine like terms: -280 + 386.1225 = 106.1225
386.1225 + -39.3x + x2 = 106.1225

Factor a perfect square on the left side:
(x + -19.65)(x + -19.65) = 106.1225

Calculate the square root of the right side: 10.301577549

Break this problem into two subproblems by setting 
(x + -19.65) equal to 10.301577549 and -10.301577549.

Subproblem 1

x + -19.65 = 10.301577549 Simplifying x + -19.65 = 10.301577549 Reorder the terms: -19.65 + x = 10.301577549 Solving -19.65 + x = 10.301577549 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '19.65' to each side of the equation. -19.65 + 19.65 + x = 10.301577549 + 19.65 Combine like terms: -19.65 + 19.65 = 0.00 0.00 + x = 10.301577549 + 19.65 x = 10.301577549 + 19.65 Combine like terms: 10.301577549 + 19.65 = 29.951577549 x = 29.951577549 Simplifying x = 29.951577549

Subproblem 2

x + -19.65 = -10.301577549 Simplifying x + -19.65 = -10.301577549 Reorder the terms: -19.65 + x = -10.301577549 Solving -19.65 + x = -10.301577549 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '19.65' to each side of the equation. -19.65 + 19.65 + x = -10.301577549 + 19.65 Combine like terms: -19.65 + 19.65 = 0.00 0.00 + x = -10.301577549 + 19.65 x = -10.301577549 + 19.65 Combine like terms: -10.301577549 + 19.65 = 9.348422451 x = 9.348422451 Simplifying x = 9.348422451

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.951577549, 9.348422451}

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