-3x=x^2-9x+20

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Solution for -3x=x^2-9x+20 equation:


Simplifying
-3x = x2 + -9x + 20

Reorder the terms:
-3x = 20 + -9x + x2

Solving
-3x = 20 + -9x + x2

Solving for variable 'x'.

Reorder the terms:
-20 + -3x + 9x + -1x2 = 20 + -9x + x2 + -20 + 9x + -1x2

Combine like terms: -3x + 9x = 6x
-20 + 6x + -1x2 = 20 + -9x + x2 + -20 + 9x + -1x2

Reorder the terms:
-20 + 6x + -1x2 = 20 + -20 + -9x + 9x + x2 + -1x2

Combine like terms: 20 + -20 = 0
-20 + 6x + -1x2 = 0 + -9x + 9x + x2 + -1x2
-20 + 6x + -1x2 = -9x + 9x + x2 + -1x2

Combine like terms: -9x + 9x = 0
-20 + 6x + -1x2 = 0 + x2 + -1x2
-20 + 6x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-20 + 6x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
20 + -6x + x2 = 0

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -6x + -20 + x2 = 0 + -20

Reorder the terms:
20 + -20 + -6x + x2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -6x + x2 = 0 + -20
-6x + x2 = 0 + -20

Combine like terms: 0 + -20 = -20
-6x + x2 = -20

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -20 + 9

Reorder the terms:
9 + -6x + x2 = -20 + 9

Combine like terms: -20 + 9 = -11
9 + -6x + x2 = -11

Factor a perfect square on the left side:
(x + -3)(x + -3) = -11

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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