-x^2+4x-1=9

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Solution for -x^2+4x-1=9 equation:


Simplifying
-1x2 + 4x + -1 = 9

Reorder the terms:
-1 + 4x + -1x2 = 9

Solving
-1 + 4x + -1x2 = 9

Solving for variable 'x'.

Reorder the terms:
-1 + -9 + 4x + -1x2 = 9 + -9

Combine like terms: -1 + -9 = -10
-10 + 4x + -1x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-10 + 4x + -1x2 = 0

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

Divide each side by '-1'.
10 + -4x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -4x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -4x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -4x + x2 = 0 + -10
-4x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-4x + x2 = -10

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -10 + 4

Reorder the terms:
4 + -4x + x2 = -10 + 4

Combine like terms: -10 + 4 = -6
4 + -4x + x2 = -6

Factor a perfect square on the left side:
(x + -2)(x + -2) = -6

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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