X*2-10x+21=0

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Solution for X*2-10x+21=0 equation:


Simplifying
X * 2 + -10x + 21 = 0

Reorder the terms for easier multiplication:
2X + -10x + 21 = 0

Reorder the terms:
21 + 2X + -10x = 0

Solving
21 + 2X + -10x = 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 + 2X + -21 + -10x = 0 + -21

Reorder the terms:
21 + -21 + 2X + -10x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 2X + -10x = 0 + -21
2X + -10x = 0 + -21

Combine like terms: 0 + -21 = -21
2X + -10x = -21

Add '10x' to each side of the equation.
2X + -10x + 10x = -21 + 10x

Combine like terms: -10x + 10x = 0
2X + 0 = -21 + 10x
2X = -21 + 10x

Divide each side by '2'.
X = -10.5 + 5x

Simplifying
X = -10.5 + 5x

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