5x^2+27x-98=0

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Solution for 5x^2+27x-98=0 equation:


Simplifying
5x2 + 27x + -98 = 0

Reorder the terms:
-98 + 27x + 5x2 = 0

Solving
-98 + 27x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-19.6 + 5.4x + x2 = 0

Move the constant term to the right:

Add '19.6' to each side of the equation.
-19.6 + 5.4x + 19.6 + x2 = 0 + 19.6

Reorder the terms:
-19.6 + 19.6 + 5.4x + x2 = 0 + 19.6

Combine like terms: -19.6 + 19.6 = 0.0
0.0 + 5.4x + x2 = 0 + 19.6
5.4x + x2 = 0 + 19.6

Combine like terms: 0 + 19.6 = 19.6
5.4x + x2 = 19.6

The x term is 5.4x.  Take half its coefficient (2.7).
Square it (7.29) and add it to both sides.

Add '7.29' to each side of the equation.
5.4x + 7.29 + x2 = 19.6 + 7.29

Reorder the terms:
7.29 + 5.4x + x2 = 19.6 + 7.29

Combine like terms: 19.6 + 7.29 = 26.89
7.29 + 5.4x + x2 = 26.89

Factor a perfect square on the left side:
(x + 2.7)(x + 2.7) = 26.89

Calculate the square root of the right side: 5.185556865

Break this problem into two subproblems by setting 
(x + 2.7) equal to 5.185556865 and -5.185556865.

Subproblem 1

x + 2.7 = 5.185556865 Simplifying x + 2.7 = 5.185556865 Reorder the terms: 2.7 + x = 5.185556865 Solving 2.7 + x = 5.185556865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.7' to each side of the equation. 2.7 + -2.7 + x = 5.185556865 + -2.7 Combine like terms: 2.7 + -2.7 = 0.0 0.0 + x = 5.185556865 + -2.7 x = 5.185556865 + -2.7 Combine like terms: 5.185556865 + -2.7 = 2.485556865 x = 2.485556865 Simplifying x = 2.485556865

Subproblem 2

x + 2.7 = -5.185556865 Simplifying x + 2.7 = -5.185556865 Reorder the terms: 2.7 + x = -5.185556865 Solving 2.7 + x = -5.185556865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.7' to each side of the equation. 2.7 + -2.7 + x = -5.185556865 + -2.7 Combine like terms: 2.7 + -2.7 = 0.0 0.0 + x = -5.185556865 + -2.7 x = -5.185556865 + -2.7 Combine like terms: -5.185556865 + -2.7 = -7.885556865 x = -7.885556865 Simplifying x = -7.885556865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.485556865, -7.885556865}

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