-5w^2+3=-7w

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Solution for -5w^2+3=-7w equation:


Simplifying
-5w2 + 3 = -7w

Reorder the terms:
3 + -5w2 = -7w

Solving
3 + -5w2 = -7w

Solving for variable 'w'.

Reorder the terms:
3 + 7w + -5w2 = -7w + 7w

Combine like terms: -7w + 7w = 0
3 + 7w + -5w2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-0.6 + -1.4w + w2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -1.4w + 0.6 + w2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -1.4w + w2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -1.4w + w2 = 0 + 0.6
-1.4w + w2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-1.4w + w2 = 0.6

The w term is -1.4w.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4w + 0.49 + w2 = 0.6 + 0.49

Reorder the terms:
0.49 + -1.4w + w2 = 0.6 + 0.49

Combine like terms: 0.6 + 0.49 = 1.09
0.49 + -1.4w + w2 = 1.09

Factor a perfect square on the left side:
(w + -0.7)(w + -0.7) = 1.09

Calculate the square root of the right side: 1.044030651

Break this problem into two subproblems by setting 
(w + -0.7) equal to 1.044030651 and -1.044030651.

Subproblem 1

w + -0.7 = 1.044030651 Simplifying w + -0.7 = 1.044030651 Reorder the terms: -0.7 + w = 1.044030651 Solving -0.7 + w = 1.044030651 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + w = 1.044030651 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + w = 1.044030651 + 0.7 w = 1.044030651 + 0.7 Combine like terms: 1.044030651 + 0.7 = 1.744030651 w = 1.744030651 Simplifying w = 1.744030651

Subproblem 2

w + -0.7 = -1.044030651 Simplifying w + -0.7 = -1.044030651 Reorder the terms: -0.7 + w = -1.044030651 Solving -0.7 + w = -1.044030651 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + w = -1.044030651 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + w = -1.044030651 + 0.7 w = -1.044030651 + 0.7 Combine like terms: -1.044030651 + 0.7 = -0.344030651 w = -0.344030651 Simplifying w = -0.344030651

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.744030651, -0.344030651}

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