2x^2-14x-70=0

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Solution for 2x^2-14x-70=0 equation: 


Simplifying
2x2 + -14x + -70 = 0

Reorder the terms:
-70 + -14x + 2x2 = 0

Solving
-70 + -14x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-35 + -7x + x2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-35 + -7x + x2)' equal to zero and attempt to solve:

Simplifying
-35 + -7x + x2 = 0

Solving
-35 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -7x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + -7x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -7x + x2 = 0 + 35
-7x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
-7x + x2 = 35

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 35 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 35 + 12.25

Combine like terms: 35 + 12.25 = 47.25
12.25 + -7x + x2 = 47.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 47.25

Calculate the square root of the right side: 6.873863542

Break this problem into two subproblems by setting 
(x + -3.5) equal to 6.873863542 and -6.873863542.


Subproblem 1
x + -3.5 = 6.873863542

Simplifying
x + -3.5 = 6.873863542

Reorder the terms:
-3.5 + x = 6.873863542

Solving
-3.5 + x = 6.873863542

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.5' to each side of the equation.
-3.5 + 3.5 + x = 6.873863542 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + x = 6.873863542 + 3.5
x = 6.873863542 + 3.5

Combine like terms: 6.873863542 + 3.5 = 10.373863542
x = 10.373863542

Simplifying
x = 10.373863542


Subproblem 2
x + -3.5 = -6.873863542

Simplifying
x + -3.5 = -6.873863542

Reorder the terms:
-3.5 + x = -6.873863542

Solving
-3.5 + x = -6.873863542

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.5' to each side of the equation.
-3.5 + 3.5 + x = -6.873863542 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + x = -6.873863542 + 3.5
x = -6.873863542 + 3.5

Combine like terms: -6.873863542 + 3.5 = -3.373863542
x = -3.373863542

Simplifying
x = -3.373863542


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {10.373863542, -3.373863542}
Solution
x = {10.373863542, -3.373863542}

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