x^2+19x-70=0

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Solution for x^2+19x-70=0 equation:


Simplifying
x2 + 19x + -70 = 0

Reorder the terms:
-70 + 19x + x2 = 0

Solving
-70 + 19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + 19x + 70 + x2 = 0 + 70

Reorder the terms:
-70 + 70 + 19x + x2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 19x + x2 = 0 + 70
19x + x2 = 0 + 70

Combine like terms: 0 + 70 = 70
19x + x2 = 70

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 = 70 + 90.25

Reorder the terms:
90.25 + 19x + x2 = 70 + 90.25

Combine like terms: 70 + 90.25 = 160.25
90.25 + 19x + x2 = 160.25

Factor a perfect square on the left side:
(x + 9.5)(x + 9.5) = 160.25

Calculate the square root of the right side: 12.658988901

Break this problem into two subproblems by setting 
(x + 9.5) equal to 12.658988901 and -12.658988901.

Subproblem 1

x + 9.5 = 12.658988901 Simplifying x + 9.5 = 12.658988901 Reorder the terms: 9.5 + x = 12.658988901 Solving 9.5 + x = 12.658988901 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 = 12.658988901 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = 12.658988901 + -9.5 x = 12.658988901 + -9.5 Combine like terms: 12.658988901 + -9.5 = 3.158988901 x = 3.158988901 Simplifying x = 3.158988901

Subproblem 2

x + 9.5 = -12.658988901 Simplifying x + 9.5 = -12.658988901 Reorder the terms: 9.5 + x = -12.658988901 Solving 9.5 + x = -12.658988901 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 = -12.658988901 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + x = -12.658988901 + -9.5 x = -12.658988901 + -9.5 Combine like terms: -12.658988901 + -9.5 = -22.158988901 x = -22.158988901 Simplifying x = -22.158988901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.158988901, -22.158988901}

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