D^2-21d+20=0

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Solution for D^2-21d+20=0 equation:


Simplifying
D2 + -21d + 20 = 0

Reorder the terms:
20 + D2 + -21d = 0

Solving
20 + D2 + -21d = 0

Solving for variable 'D'.

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

Add '-20' to each side of the equation.
20 + D2 + -20 + -21d = 0 + -20

Reorder the terms:
20 + -20 + D2 + -21d = 0 + -20

Combine like terms: 20 + -20 = 0
0 + D2 + -21d = 0 + -20
D2 + -21d = 0 + -20

Combine like terms: 0 + -20 = -20
D2 + -21d = -20

Add '21d' to each side of the equation.
D2 + -21d + 21d = -20 + 21d

Combine like terms: -21d + 21d = 0
D2 + 0 = -20 + 21d
D2 = -20 + 21d

Simplifying
D2 = -20 + 21d

Reorder the terms:
20 + D2 + -21d = -20 + 21d + 20 + -21d

Reorder the terms:
20 + D2 + -21d = -20 + 20 + 21d + -21d

Combine like terms: -20 + 20 = 0
20 + D2 + -21d = 0 + 21d + -21d
20 + D2 + -21d = 21d + -21d

Combine like terms: 21d + -21d = 0
20 + D2 + -21d = 0

The solution to this equation could not be determined.

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