5x^2+19x-101=0

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Solution for 5x^2+19x-101=0 equation:


Simplifying
5x2 + 19x + -101 = 0

Reorder the terms:
-101 + 19x + 5x2 = 0

Solving
-101 + 19x + 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'.
-20.2 + 3.8x + x2 = 0

Move the constant term to the right:

Add '20.2' to each side of the equation.
-20.2 + 3.8x + 20.2 + x2 = 0 + 20.2

Reorder the terms:
-20.2 + 20.2 + 3.8x + x2 = 0 + 20.2

Combine like terms: -20.2 + 20.2 = 0.0
0.0 + 3.8x + x2 = 0 + 20.2
3.8x + x2 = 0 + 20.2

Combine like terms: 0 + 20.2 = 20.2
3.8x + x2 = 20.2

The x term is 3.8x.  Take half its coefficient (1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
3.8x + 3.61 + x2 = 20.2 + 3.61

Reorder the terms:
3.61 + 3.8x + x2 = 20.2 + 3.61

Combine like terms: 20.2 + 3.61 = 23.81
3.61 + 3.8x + x2 = 23.81

Factor a perfect square on the left side:
(x + 1.9)(x + 1.9) = 23.81

Calculate the square root of the right side: 4.87954916

Break this problem into two subproblems by setting 
(x + 1.9) equal to 4.87954916 and -4.87954916.

Subproblem 1

x + 1.9 = 4.87954916 Simplifying x + 1.9 = 4.87954916 Reorder the terms: 1.9 + x = 4.87954916 Solving 1.9 + x = 4.87954916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = 4.87954916 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 4.87954916 + -1.9 x = 4.87954916 + -1.9 Combine like terms: 4.87954916 + -1.9 = 2.97954916 x = 2.97954916 Simplifying x = 2.97954916

Subproblem 2

x + 1.9 = -4.87954916 Simplifying x + 1.9 = -4.87954916 Reorder the terms: 1.9 + x = -4.87954916 Solving 1.9 + x = -4.87954916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = -4.87954916 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -4.87954916 + -1.9 x = -4.87954916 + -1.9 Combine like terms: -4.87954916 + -1.9 = -6.77954916 x = -6.77954916 Simplifying x = -6.77954916

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.97954916, -6.77954916}

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