-5w^2+23w-42=0

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Solution for -5w^2+23w-42=0 equation:


Simplifying
-5w2 + 23w + -42 = 0

Reorder the terms:
-42 + 23w + -5w2 = 0

Solving
-42 + 23w + -5w2 = 0

Solving for variable 'w'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
8.4 + -4.6w + w2 = 0

Move the constant term to the right:

Add '-8.4' to each side of the equation.
8.4 + -4.6w + -8.4 + w2 = 0 + -8.4

Reorder the terms:
8.4 + -8.4 + -4.6w + w2 = 0 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + -4.6w + w2 = 0 + -8.4
-4.6w + w2 = 0 + -8.4

Combine like terms: 0 + -8.4 = -8.4
-4.6w + w2 = -8.4

The w term is -4.6w.  Take half its coefficient (-2.3).
Square it (5.29) and add it to both sides.

Add '5.29' to each side of the equation.
-4.6w + 5.29 + w2 = -8.4 + 5.29

Reorder the terms:
5.29 + -4.6w + w2 = -8.4 + 5.29

Combine like terms: -8.4 + 5.29 = -3.11
5.29 + -4.6w + w2 = -3.11

Factor a perfect square on the left side:
(w + -2.3)(w + -2.3) = -3.11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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