x^2-2x-4=-9

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


Simplifying
x2 + -2x + -4 = -9

Reorder the terms:
-4 + -2x + x2 = -9

Solving
-4 + -2x + x2 = -9

Solving for variable 'x'.

Reorder the terms:
-4 + 9 + -2x + x2 = -9 + 9

Combine like terms: -4 + 9 = 5
5 + -2x + x2 = -9 + 9

Combine like terms: -9 + 9 = 0
5 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -2x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -2x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -2x + x2 = 0 + -5
-2x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-2x + x2 = -5

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -5 + 1

Reorder the terms:
1 + -2x + x2 = -5 + 1

Combine like terms: -5 + 1 = -4
1 + -2x + x2 = -4

Factor a perfect square on the left side:
(x + -1)(x + -1) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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