=5x^2+19x-54

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Solution for =5x^2+19x-54 equation:


Simplifying
0 = 5x2 + 19x + -54

Reorder the terms:
0 = -54 + 19x + 5x2

Solving
0 = -54 + 19x + 5x2

Solving for variable 'x'.

Combine like terms: 0 + 54 = 54
54 + -19x + -5x2 = -54 + 19x + 5x2 + 54 + -19x + -5x2

Reorder the terms:
54 + -19x + -5x2 = -54 + 54 + 19x + -19x + 5x2 + -5x2

Combine like terms: -54 + 54 = 0
54 + -19x + -5x2 = 0 + 19x + -19x + 5x2 + -5x2
54 + -19x + -5x2 = 19x + -19x + 5x2 + -5x2

Combine like terms: 19x + -19x = 0
54 + -19x + -5x2 = 0 + 5x2 + -5x2
54 + -19x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
54 + -19x + -5x2 = 0

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

Divide each side by '-5'.
-10.8 + 3.8x + x2 = 0

Move the constant term to the right:

Add '10.8' to each side of the equation.
-10.8 + 3.8x + 10.8 + x2 = 0 + 10.8

Reorder the terms:
-10.8 + 10.8 + 3.8x + x2 = 0 + 10.8

Combine like terms: -10.8 + 10.8 = 0.0
0.0 + 3.8x + x2 = 0 + 10.8
3.8x + x2 = 0 + 10.8

Combine like terms: 0 + 10.8 = 10.8
3.8x + x2 = 10.8

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 = 10.8 + 3.61

Reorder the terms:
3.61 + 3.8x + x2 = 10.8 + 3.61

Combine like terms: 10.8 + 3.61 = 14.41
3.61 + 3.8x + x2 = 14.41

Factor a perfect square on the left side:
(x + 1.9)(x + 1.9) = 14.41

Calculate the square root of the right side: 3.796050579

Break this problem into two subproblems by setting 
(x + 1.9) equal to 3.796050579 and -3.796050579.

Subproblem 1

x + 1.9 = 3.796050579 Simplifying x + 1.9 = 3.796050579 Reorder the terms: 1.9 + x = 3.796050579 Solving 1.9 + x = 3.796050579 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 = 3.796050579 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 3.796050579 + -1.9 x = 3.796050579 + -1.9 Combine like terms: 3.796050579 + -1.9 = 1.896050579 x = 1.896050579 Simplifying x = 1.896050579

Subproblem 2

x + 1.9 = -3.796050579 Simplifying x + 1.9 = -3.796050579 Reorder the terms: 1.9 + x = -3.796050579 Solving 1.9 + x = -3.796050579 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 = -3.796050579 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -3.796050579 + -1.9 x = -3.796050579 + -1.9 Combine like terms: -3.796050579 + -1.9 = -5.696050579 x = -5.696050579 Simplifying x = -5.696050579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.896050579, -5.696050579}

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