U^2-20u-21=0

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Solution for U^2-20u-21=0 equation:


Simplifying
U2 + -20u + -21 = 0

Reorder the terms:
-21 + U2 + -20u = 0

Solving
-21 + U2 + -20u = 0

Solving for variable 'U'.

Move all terms containing U to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + U2 + 21 + -20u = 0 + 21

Reorder the terms:
-21 + 21 + U2 + -20u = 0 + 21

Combine like terms: -21 + 21 = 0
0 + U2 + -20u = 0 + 21
U2 + -20u = 0 + 21

Combine like terms: 0 + 21 = 21
U2 + -20u = 21

Add '20u' to each side of the equation.
U2 + -20u + 20u = 21 + 20u

Combine like terms: -20u + 20u = 0
U2 + 0 = 21 + 20u
U2 = 21 + 20u

Simplifying
U2 = 21 + 20u

Reorder the terms:
-21 + U2 + -20u = 21 + 20u + -21 + -20u

Reorder the terms:
-21 + U2 + -20u = 21 + -21 + 20u + -20u

Combine like terms: 21 + -21 = 0
-21 + U2 + -20u = 0 + 20u + -20u
-21 + U2 + -20u = 20u + -20u

Combine like terms: 20u + -20u = 0
-21 + U2 + -20u = 0

The solution to this equation could not be determined.

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