4w^2-3w-100=0

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Solution for 4w^2-3w-100=0 equation:


Simplifying
4w2 + -3w + -100 = 0

Reorder the terms:
-100 + -3w + 4w2 = 0

Solving
-100 + -3w + 4w2 = 0

Solving for variable 'w'.

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

Divide each side by '4'.
-25 + -0.75w + w2 = 0

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + -0.75w + 25 + w2 = 0 + 25

Reorder the terms:
-25 + 25 + -0.75w + w2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + -0.75w + w2 = 0 + 25
-0.75w + w2 = 0 + 25

Combine like terms: 0 + 25 = 25
-0.75w + w2 = 25

The w term is -0.75w.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75w + 0.140625 + w2 = 25 + 0.140625

Reorder the terms:
0.140625 + -0.75w + w2 = 25 + 0.140625

Combine like terms: 25 + 0.140625 = 25.140625
0.140625 + -0.75w + w2 = 25.140625

Factor a perfect square on the left side:
(w + -0.375)(w + -0.375) = 25.140625

Calculate the square root of the right side: 5.01404278

Break this problem into two subproblems by setting 
(w + -0.375) equal to 5.01404278 and -5.01404278.

Subproblem 1

w + -0.375 = 5.01404278 Simplifying w + -0.375 = 5.01404278 Reorder the terms: -0.375 + w = 5.01404278 Solving -0.375 + w = 5.01404278 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + w = 5.01404278 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + w = 5.01404278 + 0.375 w = 5.01404278 + 0.375 Combine like terms: 5.01404278 + 0.375 = 5.38904278 w = 5.38904278 Simplifying w = 5.38904278

Subproblem 2

w + -0.375 = -5.01404278 Simplifying w + -0.375 = -5.01404278 Reorder the terms: -0.375 + w = -5.01404278 Solving -0.375 + w = -5.01404278 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + w = -5.01404278 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + w = -5.01404278 + 0.375 w = -5.01404278 + 0.375 Combine like terms: -5.01404278 + 0.375 = -4.63904278 w = -4.63904278 Simplifying w = -4.63904278

Solution

The solution to the problem is based on the solutions from the subproblems. w = {5.38904278, -4.63904278}

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