U^2-2U-4=-8

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Solution for U^2-2U-4=-8 equation:


Simplifying
U2 + -2U + -4 = -8

Reorder the terms:
-4 + -2U + U2 = -8

Solving
-4 + -2U + U2 = -8

Solving for variable 'U'.

Reorder the terms:
-4 + 8 + -2U + U2 = -8 + 8

Combine like terms: -4 + 8 = 4
4 + -2U + U2 = -8 + 8

Combine like terms: -8 + 8 = 0
4 + -2U + U2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -2U + -4 + U2 = 0 + -4

Reorder the terms:
4 + -4 + -2U + U2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -2U + U2 = 0 + -4
-2U + U2 = 0 + -4

Combine like terms: 0 + -4 = -4
-2U + U2 = -4

The U term is -2U.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2U + 1 + U2 = -4 + 1

Reorder the terms:
1 + -2U + U2 = -4 + 1

Combine like terms: -4 + 1 = -3
1 + -2U + U2 = -3

Factor a perfect square on the left side:
(U + -1)(U + -1) = -3

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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