4w-w^2=15

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Solution for 4w-w^2=15 equation:


Simplifying
4w + -1w2 = 15

Solving
4w + -1w2 = 15

Solving for variable 'w'.

Reorder the terms:
-15 + 4w + -1w2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 4w + -1w2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
15 + -4w + w2 = 0

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -4w + -15 + w2 = 0 + -15

Reorder the terms:
15 + -15 + -4w + w2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -4w + w2 = 0 + -15
-4w + w2 = 0 + -15

Combine like terms: 0 + -15 = -15
-4w + w2 = -15

The w term is -4w.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4w + 4 + w2 = -15 + 4

Reorder the terms:
4 + -4w + w2 = -15 + 4

Combine like terms: -15 + 4 = -11
4 + -4w + w2 = -11

Factor a perfect square on the left side:
(w + -2)(w + -2) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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