2w^2+2w+3=70

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Solution for 2w^2+2w+3=70 equation:


Simplifying
2w2 + 2w + 3 = 70

Reorder the terms:
3 + 2w + 2w2 = 70

Solving
3 + 2w + 2w2 = 70

Solving for variable 'w'.

Reorder the terms:
3 + -70 + 2w + 2w2 = 70 + -70

Combine like terms: 3 + -70 = -67
-67 + 2w + 2w2 = 70 + -70

Combine like terms: 70 + -70 = 0
-67 + 2w + 2w2 = 0

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

Divide each side by '2'.
-33.5 + w + w2 = 0

Move the constant term to the right:

Add '33.5' to each side of the equation.
-33.5 + w + 33.5 + w2 = 0 + 33.5

Reorder the terms:
-33.5 + 33.5 + w + w2 = 0 + 33.5

Combine like terms: -33.5 + 33.5 = 0.0
0.0 + w + w2 = 0 + 33.5
w + w2 = 0 + 33.5

Combine like terms: 0 + 33.5 = 33.5
w + w2 = 33.5

The w term is w.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + w2 = 33.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + w2 = 33.5 + 0.25

Combine like terms: 33.5 + 0.25 = 33.75
1.25 + w2 = 33.75

Factor a perfect square on the left side:
(w + 0.5)(w + 0.5) = 33.75

Calculate the square root of the right side: 5.809475019

Break this problem into two subproblems by setting 
(w + 0.5) equal to 5.809475019 and -5.809475019.

Subproblem 1

w + 0.5 = 5.809475019 Simplifying w + 0.5 = 5.809475019 Reorder the terms: 0.5 + w = 5.809475019 Solving 0.5 + w = 5.809475019 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + w = 5.809475019 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + w = 5.809475019 + -0.5 w = 5.809475019 + -0.5 Combine like terms: 5.809475019 + -0.5 = 5.309475019 w = 5.309475019 Simplifying w = 5.309475019

Subproblem 2

w + 0.5 = -5.809475019 Simplifying w + 0.5 = -5.809475019 Reorder the terms: 0.5 + w = -5.809475019 Solving 0.5 + w = -5.809475019 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + w = -5.809475019 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + w = -5.809475019 + -0.5 w = -5.809475019 + -0.5 Combine like terms: -5.809475019 + -0.5 = -6.309475019 w = -6.309475019 Simplifying w = -6.309475019

Solution

The solution to the problem is based on the solutions from the subproblems. w = {5.309475019, -6.309475019}

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