10w^2+13w-15=

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Solution for 10w^2+13w-15= equation:


Simplifying
10w2 + 13w + -15 = 0

Reorder the terms:
-15 + 13w + 10w2 = 0

Solving
-15 + 13w + 10w2 = 0

Solving for variable 'w'.

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

Divide each side by '10'.
-1.5 + 1.3w + w2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 1.3w + 1.5 + w2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 1.3w + w2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 1.3w + w2 = 0 + 1.5
1.3w + w2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
1.3w + w2 = 1.5

The w term is 1.3w.  Take half its coefficient (0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
1.3w + 0.4225 + w2 = 1.5 + 0.4225

Reorder the terms:
0.4225 + 1.3w + w2 = 1.5 + 0.4225

Combine like terms: 1.5 + 0.4225 = 1.9225
0.4225 + 1.3w + w2 = 1.9225

Factor a perfect square on the left side:
(w + 0.65)(w + 0.65) = 1.9225

Calculate the square root of the right side: 1.386542462

Break this problem into two subproblems by setting 
(w + 0.65) equal to 1.386542462 and -1.386542462.

Subproblem 1

w + 0.65 = 1.386542462 Simplifying w + 0.65 = 1.386542462 Reorder the terms: 0.65 + w = 1.386542462 Solving 0.65 + w = 1.386542462 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.65' to each side of the equation. 0.65 + -0.65 + w = 1.386542462 + -0.65 Combine like terms: 0.65 + -0.65 = 0.00 0.00 + w = 1.386542462 + -0.65 w = 1.386542462 + -0.65 Combine like terms: 1.386542462 + -0.65 = 0.736542462 w = 0.736542462 Simplifying w = 0.736542462

Subproblem 2

w + 0.65 = -1.386542462 Simplifying w + 0.65 = -1.386542462 Reorder the terms: 0.65 + w = -1.386542462 Solving 0.65 + w = -1.386542462 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.65' to each side of the equation. 0.65 + -0.65 + w = -1.386542462 + -0.65 Combine like terms: 0.65 + -0.65 = 0.00 0.00 + w = -1.386542462 + -0.65 w = -1.386542462 + -0.65 Combine like terms: -1.386542462 + -0.65 = -2.036542462 w = -2.036542462 Simplifying w = -2.036542462

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.736542462, -2.036542462}

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