42x^2+16x-93=0

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Solution for 42x^2+16x-93=0 equation:


Simplifying
42x2 + 16x + -93 = 0

Reorder the terms:
-93 + 16x + 42x2 = 0

Solving
-93 + 16x + 42x2 = 0

Solving for variable 'x'.

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

Divide each side by '42'.
-2.214285714 + 0.380952381x + x2 = 0

Move the constant term to the right:

Add '2.214285714' to each side of the equation.
-2.214285714 + 0.380952381x + 2.214285714 + x2 = 0 + 2.214285714

Reorder the terms:
-2.214285714 + 2.214285714 + 0.380952381x + x2 = 0 + 2.214285714

Combine like terms: -2.214285714 + 2.214285714 = 0.000000000
0.000000000 + 0.380952381x + x2 = 0 + 2.214285714
0.380952381x + x2 = 0 + 2.214285714

Combine like terms: 0 + 2.214285714 = 2.214285714
0.380952381x + x2 = 2.214285714

The x term is 0.380952381x.  Take half its coefficient (0.1904761905).
Square it (0.03628117915) and add it to both sides.

Add '0.03628117915' to each side of the equation.
0.380952381x + 0.03628117915 + x2 = 2.214285714 + 0.03628117915

Reorder the terms:
0.03628117915 + 0.380952381x + x2 = 2.214285714 + 0.03628117915

Combine like terms: 2.214285714 + 0.03628117915 = 2.25056689315
0.03628117915 + 0.380952381x + x2 = 2.25056689315

Factor a perfect square on the left side:
(x + 0.1904761905)(x + 0.1904761905) = 2.25056689315

Calculate the square root of the right side: 1.500188952

Break this problem into two subproblems by setting 
(x + 0.1904761905) equal to 1.500188952 and -1.500188952.

Subproblem 1

x + 0.1904761905 = 1.500188952 Simplifying x + 0.1904761905 = 1.500188952 Reorder the terms: 0.1904761905 + x = 1.500188952 Solving 0.1904761905 + x = 1.500188952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1904761905' to each side of the equation. 0.1904761905 + -0.1904761905 + x = 1.500188952 + -0.1904761905 Combine like terms: 0.1904761905 + -0.1904761905 = 0.0000000000 0.0000000000 + x = 1.500188952 + -0.1904761905 x = 1.500188952 + -0.1904761905 Combine like terms: 1.500188952 + -0.1904761905 = 1.3097127615 x = 1.3097127615 Simplifying x = 1.3097127615

Subproblem 2

x + 0.1904761905 = -1.500188952 Simplifying x + 0.1904761905 = -1.500188952 Reorder the terms: 0.1904761905 + x = -1.500188952 Solving 0.1904761905 + x = -1.500188952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1904761905' to each side of the equation. 0.1904761905 + -0.1904761905 + x = -1.500188952 + -0.1904761905 Combine like terms: 0.1904761905 + -0.1904761905 = 0.0000000000 0.0000000000 + x = -1.500188952 + -0.1904761905 x = -1.500188952 + -0.1904761905 Combine like terms: -1.500188952 + -0.1904761905 = -1.6906651425 x = -1.6906651425 Simplifying x = -1.6906651425

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.3097127615, -1.6906651425}

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