x^2+19x-142=0

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Solution for x^2+19x-142=0 equation:


Simplifying
x2 + 19x + -142 = 0

Reorder the terms:
-142 + 19x + x2 = 0

Solving
-142 + 19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '142' to each side of the equation.
-142 + 19x + 142 + x2 = 0 + 142

Reorder the terms:
-142 + 142 + 19x + x2 = 0 + 142

Combine like terms: -142 + 142 = 0
0 + 19x + x2 = 0 + 142
19x + x2 = 0 + 142

Combine like terms: 0 + 142 = 142
19x + x2 = 142

The x term is 19x.  Take half its coefficient (9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
19x + 90.25 + x2 = 142 + 90.25

Reorder the terms:
90.25 + 19x + x2 = 142 + 90.25

Combine like terms: 142 + 90.25 = 232.25
90.25 + 19x + x2 = 232.25

Factor a perfect square on the left side:
(x + 9.5)(x + 9.5) = 232.25

Calculate the square root of the right side: 15.239750654

Break this problem into two subproblems by setting 
(x + 9.5) equal to 15.239750654 and -15.239750654.

Subproblem 1

x + 9.5 = 15.239750654 Simplifying x + 9.5 = 15.239750654 Reorder the terms: 9.5 + x = 15.239750654 Solving 9.5 + x = 15.239750654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = 15.239750654 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = 15.239750654 + -9.5 x = 15.239750654 + -9.5 Combine like terms: 15.239750654 + -9.5 = 5.739750654 x = 5.739750654 Simplifying x = 5.739750654

Subproblem 2

x + 9.5 = -15.239750654 Simplifying x + 9.5 = -15.239750654 Reorder the terms: 9.5 + x = -15.239750654 Solving 9.5 + x = -15.239750654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + x = -15.239750654 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = -15.239750654 + -9.5 x = -15.239750654 + -9.5 Combine like terms: -15.239750654 + -9.5 = -24.739750654 x = -24.739750654 Simplifying x = -24.739750654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.739750654, -24.739750654}

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