w^2+2w-70=0

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Solution for w^2+2w-70=0 equation:


Simplifying
w2 + 2w + -70 = 0

Reorder the terms:
-70 + 2w + w2 = 0

Solving
-70 + 2w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + 2w + 70 + w2 = 0 + 70

Reorder the terms:
-70 + 70 + 2w + w2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 2w + w2 = 0 + 70
2w + w2 = 0 + 70

Combine like terms: 0 + 70 = 70
2w + w2 = 70

The w term is 2w.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2w + 1 + w2 = 70 + 1

Reorder the terms:
1 + 2w + w2 = 70 + 1

Combine like terms: 70 + 1 = 71
1 + 2w + w2 = 71

Factor a perfect square on the left side:
(w + 1)(w + 1) = 71

Calculate the square root of the right side: 8.426149773

Break this problem into two subproblems by setting 
(w + 1) equal to 8.426149773 and -8.426149773.

Subproblem 1

w + 1 = 8.426149773 Simplifying w + 1 = 8.426149773 Reorder the terms: 1 + w = 8.426149773 Solving 1 + w = 8.426149773 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = 8.426149773 + -1 Combine like terms: 1 + -1 = 0 0 + w = 8.426149773 + -1 w = 8.426149773 + -1 Combine like terms: 8.426149773 + -1 = 7.426149773 w = 7.426149773 Simplifying w = 7.426149773

Subproblem 2

w + 1 = -8.426149773 Simplifying w + 1 = -8.426149773 Reorder the terms: 1 + w = -8.426149773 Solving 1 + w = -8.426149773 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = -8.426149773 + -1 Combine like terms: 1 + -1 = 0 0 + w = -8.426149773 + -1 w = -8.426149773 + -1 Combine like terms: -8.426149773 + -1 = -9.426149773 w = -9.426149773 Simplifying w = -9.426149773

Solution

The solution to the problem is based on the solutions from the subproblems. w = {7.426149773, -9.426149773}

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