28x^2+97x+4=0

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Solution for 28x^2+97x+4=0 equation:


Simplifying
28x2 + 97x + 4 = 0

Reorder the terms:
4 + 97x + 28x2 = 0

Solving
4 + 97x + 28x2 = 0

Solving for variable 'x'.

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

Divide each side by '28'.
0.1428571429 + 3.464285714x + x2 = 0

Move the constant term to the right:

Add '-0.1428571429' to each side of the equation.
0.1428571429 + 3.464285714x + -0.1428571429 + x2 = 0 + -0.1428571429

Reorder the terms:
0.1428571429 + -0.1428571429 + 3.464285714x + x2 = 0 + -0.1428571429

Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000
0.0000000000 + 3.464285714x + x2 = 0 + -0.1428571429
3.464285714x + x2 = 0 + -0.1428571429

Combine like terms: 0 + -0.1428571429 = -0.1428571429
3.464285714x + x2 = -0.1428571429

The x term is 3.464285714x.  Take half its coefficient (1.732142857).
Square it (3.000318877) and add it to both sides.

Add '3.000318877' to each side of the equation.
3.464285714x + 3.000318877 + x2 = -0.1428571429 + 3.000318877

Reorder the terms:
3.000318877 + 3.464285714x + x2 = -0.1428571429 + 3.000318877

Combine like terms: -0.1428571429 + 3.000318877 = 2.8574617341
3.000318877 + 3.464285714x + x2 = 2.8574617341

Factor a perfect square on the left side:
(x + 1.732142857)(x + 1.732142857) = 2.8574617341

Calculate the square root of the right side: 1.690402832

Break this problem into two subproblems by setting 
(x + 1.732142857) equal to 1.690402832 and -1.690402832.

Subproblem 1

x + 1.732142857 = 1.690402832 Simplifying x + 1.732142857 = 1.690402832 Reorder the terms: 1.732142857 + x = 1.690402832 Solving 1.732142857 + x = 1.690402832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.732142857' to each side of the equation. 1.732142857 + -1.732142857 + x = 1.690402832 + -1.732142857 Combine like terms: 1.732142857 + -1.732142857 = 0.000000000 0.000000000 + x = 1.690402832 + -1.732142857 x = 1.690402832 + -1.732142857 Combine like terms: 1.690402832 + -1.732142857 = -0.041740025 x = -0.041740025 Simplifying x = -0.041740025

Subproblem 2

x + 1.732142857 = -1.690402832 Simplifying x + 1.732142857 = -1.690402832 Reorder the terms: 1.732142857 + x = -1.690402832 Solving 1.732142857 + x = -1.690402832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.732142857' to each side of the equation. 1.732142857 + -1.732142857 + x = -1.690402832 + -1.732142857 Combine like terms: 1.732142857 + -1.732142857 = 0.000000000 0.000000000 + x = -1.690402832 + -1.732142857 x = -1.690402832 + -1.732142857 Combine like terms: -1.690402832 + -1.732142857 = -3.422545689 x = -3.422545689 Simplifying x = -3.422545689

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.041740025, -3.422545689}

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