w^2=8w-40

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Solution for w^2=8w-40 equation:


Simplifying
w2 = 8w + -40

Reorder the terms:
w2 = -40 + 8w

Solving
w2 = -40 + 8w

Solving for variable 'w'.

Reorder the terms:
40 + -8w + w2 = -40 + 8w + 40 + -8w

Reorder the terms:
40 + -8w + w2 = -40 + 40 + 8w + -8w

Combine like terms: -40 + 40 = 0
40 + -8w + w2 = 0 + 8w + -8w
40 + -8w + w2 = 8w + -8w

Combine like terms: 8w + -8w = 0
40 + -8w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -8w + -40 + w2 = 0 + -40

Reorder the terms:
40 + -40 + -8w + w2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -8w + w2 = 0 + -40
-8w + w2 = 0 + -40

Combine like terms: 0 + -40 = -40
-8w + w2 = -40

The w term is -8w.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8w + 16 + w2 = -40 + 16

Reorder the terms:
16 + -8w + w2 = -40 + 16

Combine like terms: -40 + 16 = -24
16 + -8w + w2 = -24

Factor a perfect square on the left side:
(w + -4)(w + -4) = -24

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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