3w^2-5w=70

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Solution for 3w^2-5w=70 equation:


Simplifying
3w2 + -5w = 70

Reorder the terms:
-5w + 3w2 = 70

Solving
-5w + 3w2 = 70

Solving for variable 'w'.

Reorder the terms:
-70 + -5w + 3w2 = 70 + -70

Combine like terms: 70 + -70 = 0
-70 + -5w + 3w2 = 0

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

Divide each side by '3'.
-23.33333333 + -1.666666667w + w2 = 0

Move the constant term to the right:

Add '23.33333333' to each side of the equation.
-23.33333333 + -1.666666667w + 23.33333333 + w2 = 0 + 23.33333333

Reorder the terms:
-23.33333333 + 23.33333333 + -1.666666667w + w2 = 0 + 23.33333333

Combine like terms: -23.33333333 + 23.33333333 = 0.00000000
0.00000000 + -1.666666667w + w2 = 0 + 23.33333333
-1.666666667w + w2 = 0 + 23.33333333

Combine like terms: 0 + 23.33333333 = 23.33333333
-1.666666667w + w2 = 23.33333333

The w term is -1.666666667w.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667w + 0.6944444447 + w2 = 23.33333333 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667w + w2 = 23.33333333 + 0.6944444447

Combine like terms: 23.33333333 + 0.6944444447 = 24.0277777747
0.6944444447 + -1.666666667w + w2 = 24.0277777747

Factor a perfect square on the left side:
(w + -0.8333333335)(w + -0.8333333335) = 24.0277777747

Calculate the square root of the right side: 4.901813723

Break this problem into two subproblems by setting 
(w + -0.8333333335) equal to 4.901813723 and -4.901813723.

Subproblem 1

w + -0.8333333335 = 4.901813723 Simplifying w + -0.8333333335 = 4.901813723 Reorder the terms: -0.8333333335 + w = 4.901813723 Solving -0.8333333335 + w = 4.901813723 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + w = 4.901813723 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + w = 4.901813723 + 0.8333333335 w = 4.901813723 + 0.8333333335 Combine like terms: 4.901813723 + 0.8333333335 = 5.7351470565 w = 5.7351470565 Simplifying w = 5.7351470565

Subproblem 2

w + -0.8333333335 = -4.901813723 Simplifying w + -0.8333333335 = -4.901813723 Reorder the terms: -0.8333333335 + w = -4.901813723 Solving -0.8333333335 + w = -4.901813723 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + w = -4.901813723 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + w = -4.901813723 + 0.8333333335 w = -4.901813723 + 0.8333333335 Combine like terms: -4.901813723 + 0.8333333335 = -4.0684803895 w = -4.0684803895 Simplifying w = -4.0684803895

Solution

The solution to the problem is based on the solutions from the subproblems. w = {5.7351470565, -4.0684803895}

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