97=215w-16w^2

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Solution for 97=215w-16w^2 equation:


Simplifying
97 = 215w + -16w2

Solving
97 = 215w + -16w2

Solving for variable 'w'.

Reorder the terms:
97 + -215w + 16w2 = 215w + -215w + -16w2 + 16w2

Combine like terms: 215w + -215w = 0
97 + -215w + 16w2 = 0 + -16w2 + 16w2
97 + -215w + 16w2 = -16w2 + 16w2

Combine like terms: -16w2 + 16w2 = 0
97 + -215w + 16w2 = 0

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

Divide each side by '16'.
6.0625 + -13.4375w + w2 = 0

Move the constant term to the right:

Add '-6.0625' to each side of the equation.
6.0625 + -13.4375w + -6.0625 + w2 = 0 + -6.0625

Reorder the terms:
6.0625 + -6.0625 + -13.4375w + w2 = 0 + -6.0625

Combine like terms: 6.0625 + -6.0625 = 0.0000
0.0000 + -13.4375w + w2 = 0 + -6.0625
-13.4375w + w2 = 0 + -6.0625

Combine like terms: 0 + -6.0625 = -6.0625
-13.4375w + w2 = -6.0625

The w term is -13.4375w.  Take half its coefficient (-6.71875).
Square it (45.14160156) and add it to both sides.

Add '45.14160156' to each side of the equation.
-13.4375w + 45.14160156 + w2 = -6.0625 + 45.14160156

Reorder the terms:
45.14160156 + -13.4375w + w2 = -6.0625 + 45.14160156

Combine like terms: -6.0625 + 45.14160156 = 39.07910156
45.14160156 + -13.4375w + w2 = 39.07910156

Factor a perfect square on the left side:
(w + -6.71875)(w + -6.71875) = 39.07910156

Calculate the square root of the right side: 6.251327984

Break this problem into two subproblems by setting 
(w + -6.71875) equal to 6.251327984 and -6.251327984.

Subproblem 1

w + -6.71875 = 6.251327984 Simplifying w + -6.71875 = 6.251327984 Reorder the terms: -6.71875 + w = 6.251327984 Solving -6.71875 + w = 6.251327984 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '6.71875' to each side of the equation. -6.71875 + 6.71875 + w = 6.251327984 + 6.71875 Combine like terms: -6.71875 + 6.71875 = 0.00000 0.00000 + w = 6.251327984 + 6.71875 w = 6.251327984 + 6.71875 Combine like terms: 6.251327984 + 6.71875 = 12.970077984 w = 12.970077984 Simplifying w = 12.970077984

Subproblem 2

w + -6.71875 = -6.251327984 Simplifying w + -6.71875 = -6.251327984 Reorder the terms: -6.71875 + w = -6.251327984 Solving -6.71875 + w = -6.251327984 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '6.71875' to each side of the equation. -6.71875 + 6.71875 + w = -6.251327984 + 6.71875 Combine like terms: -6.71875 + 6.71875 = 0.00000 0.00000 + w = -6.251327984 + 6.71875 w = -6.251327984 + 6.71875 Combine like terms: -6.251327984 + 6.71875 = 0.467422016 w = 0.467422016 Simplifying w = 0.467422016

Solution

The solution to the problem is based on the solutions from the subproblems. w = {12.970077984, 0.467422016}

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