-.6x^2+259.2x=216

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Solution for -.6x^2+259.2x=216 equation:


Simplifying
-0.6x2 + 259.2x = 216

Reorder the terms:
259.2x + -0.6x2 = 216

Solving
259.2x + -0.6x2 = 216

Solving for variable 'x'.

Reorder the terms:
-216 + 259.2x + -0.6x2 = 216 + -216

Combine like terms: 216 + -216 = 0
-216 + 259.2x + -0.6x2 = 0

Begin completing the square.  Divide all terms by
-0.6 the coefficient of the squared term: 

Divide each side by '-0.6'.
360 + -432x + x2 = 0

Move the constant term to the right:

Add '-360' to each side of the equation.
360 + -432x + -360 + x2 = 0 + -360

Reorder the terms:
360 + -360 + -432x + x2 = 0 + -360

Combine like terms: 360 + -360 = 0
0 + -432x + x2 = 0 + -360
-432x + x2 = 0 + -360

Combine like terms: 0 + -360 = -360
-432x + x2 = -360

The x term is -432x.  Take half its coefficient (-216).
Square it (46656) and add it to both sides.

Add '46656' to each side of the equation.
-432x + 46656 + x2 = -360 + 46656

Reorder the terms:
46656 + -432x + x2 = -360 + 46656

Combine like terms: -360 + 46656 = 46296
46656 + -432x + x2 = 46296

Factor a perfect square on the left side:
(x + -216)(x + -216) = 46296

Calculate the square root of the right side: 215.165052924

Break this problem into two subproblems by setting 
(x + -216) equal to 215.165052924 and -215.165052924.

Subproblem 1

x + -216 = 215.165052924 Simplifying x + -216 = 215.165052924 Reorder the terms: -216 + x = 215.165052924 Solving -216 + x = 215.165052924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '216' to each side of the equation. -216 + 216 + x = 215.165052924 + 216 Combine like terms: -216 + 216 = 0 0 + x = 215.165052924 + 216 x = 215.165052924 + 216 Combine like terms: 215.165052924 + 216 = 431.165052924 x = 431.165052924 Simplifying x = 431.165052924

Subproblem 2

x + -216 = -215.165052924 Simplifying x + -216 = -215.165052924 Reorder the terms: -216 + x = -215.165052924 Solving -216 + x = -215.165052924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '216' to each side of the equation. -216 + 216 + x = -215.165052924 + 216 Combine like terms: -216 + 216 = 0 0 + x = -215.165052924 + 216 x = -215.165052924 + 216 Combine like terms: -215.165052924 + 216 = 0.834947076 x = 0.834947076 Simplifying x = 0.834947076

Solution

The solution to the problem is based on the solutions from the subproblems. x = {431.165052924, 0.834947076}

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