X^2-bx+21=0

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Solution for X^2-bx+21=0 equation:


Simplifying
X2 + -1bx + 21 = 0

Reorder the terms:
21 + X2 + -1bx = 0

Solving
21 + X2 + -1bx = 0

Solving for variable 'X'.

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

Add '-21' to each side of the equation.
21 + X2 + -21 + -1bx = 0 + -21

Reorder the terms:
21 + -21 + X2 + -1bx = 0 + -21

Combine like terms: 21 + -21 = 0
0 + X2 + -1bx = 0 + -21
X2 + -1bx = 0 + -21

Combine like terms: 0 + -21 = -21
X2 + -1bx = -21

Add 'bx' to each side of the equation.
X2 + -1bx + bx = -21 + bx

Combine like terms: -1bx + bx = 0
X2 + 0 = -21 + bx
X2 = -21 + bx

Simplifying
X2 = -21 + bx

Reorder the terms:
21 + X2 + -1bx = -21 + bx + 21 + -1bx

Reorder the terms:
21 + X2 + -1bx = -21 + 21 + bx + -1bx

Combine like terms: -21 + 21 = 0
21 + X2 + -1bx = 0 + bx + -1bx
21 + X2 + -1bx = bx + -1bx

Combine like terms: bx + -1bx = 0
21 + X2 + -1bx = 0

The solution to this equation could not be determined.

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