-3.5x^2+60x-200=0

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Solution for -3.5x^2+60x-200=0 equation:


Simplifying
-3.5x2 + 60x + -200 = 0

Reorder the terms:
-200 + 60x + -3.5x2 = 0

Solving
-200 + 60x + -3.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-3.5 the coefficient of the squared term: 

Divide each side by '-3.5'.
57.14285714 + -17.14285714x + x2 = 0

Move the constant term to the right:

Add '-57.14285714' to each side of the equation.
57.14285714 + -17.14285714x + -57.14285714 + x2 = 0 + -57.14285714

Reorder the terms:
57.14285714 + -57.14285714 + -17.14285714x + x2 = 0 + -57.14285714

Combine like terms: 57.14285714 + -57.14285714 = 0.00000000
0.00000000 + -17.14285714x + x2 = 0 + -57.14285714
-17.14285714x + x2 = 0 + -57.14285714

Combine like terms: 0 + -57.14285714 = -57.14285714
-17.14285714x + x2 = -57.14285714

The x term is -17.14285714x.  Take half its coefficient (-8.57142857).
Square it (73.46938773) and add it to both sides.

Add '73.46938773' to each side of the equation.
-17.14285714x + 73.46938773 + x2 = -57.14285714 + 73.46938773

Reorder the terms:
73.46938773 + -17.14285714x + x2 = -57.14285714 + 73.46938773

Combine like terms: -57.14285714 + 73.46938773 = 16.32653059
73.46938773 + -17.14285714x + x2 = 16.32653059

Factor a perfect square on the left side:
(x + -8.57142857)(x + -8.57142857) = 16.32653059

Calculate the square root of the right side: 4.040610175

Break this problem into two subproblems by setting 
(x + -8.57142857) equal to 4.040610175 and -4.040610175.

Subproblem 1

x + -8.57142857 = 4.040610175 Simplifying x + -8.57142857 = 4.040610175 Reorder the terms: -8.57142857 + x = 4.040610175 Solving -8.57142857 + x = 4.040610175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.57142857' to each side of the equation. -8.57142857 + 8.57142857 + x = 4.040610175 + 8.57142857 Combine like terms: -8.57142857 + 8.57142857 = 0.00000000 0.00000000 + x = 4.040610175 + 8.57142857 x = 4.040610175 + 8.57142857 Combine like terms: 4.040610175 + 8.57142857 = 12.612038745 x = 12.612038745 Simplifying x = 12.612038745

Subproblem 2

x + -8.57142857 = -4.040610175 Simplifying x + -8.57142857 = -4.040610175 Reorder the terms: -8.57142857 + x = -4.040610175 Solving -8.57142857 + x = -4.040610175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.57142857' to each side of the equation. -8.57142857 + 8.57142857 + x = -4.040610175 + 8.57142857 Combine like terms: -8.57142857 + 8.57142857 = 0.00000000 0.00000000 + x = -4.040610175 + 8.57142857 x = -4.040610175 + 8.57142857 Combine like terms: -4.040610175 + 8.57142857 = 4.530818395 x = 4.530818395 Simplifying x = 4.530818395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.612038745, 4.530818395}

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