8.5*x^2+29.2*x-162=0

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Solution for 8.5*x^2+29.2*x-162=0 equation:


Simplifying
8.5x2 + 29.2x + -162 = 0

Reorder the terms:
-162 + 29.2x + 8.5x2 = 0

Solving
-162 + 29.2x + 8.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '8.5'.
-19.05882353 + 3.435294118x + x2 = 0

Move the constant term to the right:

Add '19.05882353' to each side of the equation.
-19.05882353 + 3.435294118x + 19.05882353 + x2 = 0 + 19.05882353

Reorder the terms:
-19.05882353 + 19.05882353 + 3.435294118x + x2 = 0 + 19.05882353

Combine like terms: -19.05882353 + 19.05882353 = 0.00000000
0.00000000 + 3.435294118x + x2 = 0 + 19.05882353
3.435294118x + x2 = 0 + 19.05882353

Combine like terms: 0 + 19.05882353 = 19.05882353
3.435294118x + x2 = 19.05882353

The x term is 3.435294118x.  Take half its coefficient (1.717647059).
Square it (2.950311419) and add it to both sides.

Add '2.950311419' to each side of the equation.
3.435294118x + 2.950311419 + x2 = 19.05882353 + 2.950311419

Reorder the terms:
2.950311419 + 3.435294118x + x2 = 19.05882353 + 2.950311419

Combine like terms: 19.05882353 + 2.950311419 = 22.009134949
2.950311419 + 3.435294118x + x2 = 22.009134949

Factor a perfect square on the left side:
(x + 1.717647059)(x + 1.717647059) = 22.009134949

Calculate the square root of the right side: 4.691389448

Break this problem into two subproblems by setting 
(x + 1.717647059) equal to 4.691389448 and -4.691389448.

Subproblem 1

x + 1.717647059 = 4.691389448 Simplifying x + 1.717647059 = 4.691389448 Reorder the terms: 1.717647059 + x = 4.691389448 Solving 1.717647059 + x = 4.691389448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.717647059' to each side of the equation. 1.717647059 + -1.717647059 + x = 4.691389448 + -1.717647059 Combine like terms: 1.717647059 + -1.717647059 = 0.000000000 0.000000000 + x = 4.691389448 + -1.717647059 x = 4.691389448 + -1.717647059 Combine like terms: 4.691389448 + -1.717647059 = 2.973742389 x = 2.973742389 Simplifying x = 2.973742389

Subproblem 2

x + 1.717647059 = -4.691389448 Simplifying x + 1.717647059 = -4.691389448 Reorder the terms: 1.717647059 + x = -4.691389448 Solving 1.717647059 + x = -4.691389448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.717647059' to each side of the equation. 1.717647059 + -1.717647059 + x = -4.691389448 + -1.717647059 Combine like terms: 1.717647059 + -1.717647059 = 0.000000000 0.000000000 + x = -4.691389448 + -1.717647059 x = -4.691389448 + -1.717647059 Combine like terms: -4.691389448 + -1.717647059 = -6.409036507 x = -6.409036507 Simplifying x = -6.409036507

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.973742389, -6.409036507}

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