x^2+72=3x

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Solution for x^2+72=3x equation:


Simplifying
x2 + 72 = 3x

Reorder the terms:
72 + x2 = 3x

Solving
72 + x2 = 3x

Solving for variable 'x'.

Reorder the terms:
72 + -3x + x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
72 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-72' to each side of the equation.
72 + -3x + -72 + x2 = 0 + -72

Reorder the terms:
72 + -72 + -3x + x2 = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -3x + x2 = 0 + -72
-3x + x2 = 0 + -72

Combine like terms: 0 + -72 = -72
-3x + x2 = -72

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -72 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -72 + 2.25

Combine like terms: -72 + 2.25 = -69.75
2.25 + -3x + x2 = -69.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = -69.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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