-174+5x+3x^2=0

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Solution for -174+5x+3x^2=0 equation:


Simplifying
-174 + 5x + 3x2 = 0

Solving
-174 + 5x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-58 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '58' to each side of the equation.
-58 + 1.666666667x + 58 + x2 = 0 + 58

Reorder the terms:
-58 + 58 + 1.666666667x + x2 = 0 + 58

Combine like terms: -58 + 58 = 0
0 + 1.666666667x + x2 = 0 + 58
1.666666667x + x2 = 0 + 58

Combine like terms: 0 + 58 = 58
1.666666667x + x2 = 58

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = 58 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = 58 + 0.6944444447

Combine like terms: 58 + 0.6944444447 = 58.6944444447
0.6944444447 + 1.666666667x + x2 = 58.6944444447

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 58.6944444447

Calculate the square root of the right side: 7.661229956

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 7.661229956 and -7.661229956.

Subproblem 1

x + 0.8333333335 = 7.661229956 Simplifying x + 0.8333333335 = 7.661229956 Reorder the terms: 0.8333333335 + x = 7.661229956 Solving 0.8333333335 + x = 7.661229956 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 7.661229956 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 7.661229956 + -0.8333333335 x = 7.661229956 + -0.8333333335 Combine like terms: 7.661229956 + -0.8333333335 = 6.8278966225 x = 6.8278966225 Simplifying x = 6.8278966225

Subproblem 2

x + 0.8333333335 = -7.661229956 Simplifying x + 0.8333333335 = -7.661229956 Reorder the terms: 0.8333333335 + x = -7.661229956 Solving 0.8333333335 + x = -7.661229956 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -7.661229956 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -7.661229956 + -0.8333333335 x = -7.661229956 + -0.8333333335 Combine like terms: -7.661229956 + -0.8333333335 = -8.4945632895 x = -8.4945632895 Simplifying x = -8.4945632895

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.8278966225, -8.4945632895}

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