x^2-9x-9x+91=

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Solution for x^2-9x-9x+91= equation:


Simplifying
x2 + -9x + -9x + 91 = 0

Reorder the terms:
91 + -9x + -9x + x2 = 0

Combine like terms: -9x + -9x = -18x
91 + -18x + x2 = 0

Solving
91 + -18x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-91' to each side of the equation.
91 + -18x + -91 + x2 = 0 + -91

Reorder the terms:
91 + -91 + -18x + x2 = 0 + -91

Combine like terms: 91 + -91 = 0
0 + -18x + x2 = 0 + -91
-18x + x2 = 0 + -91

Combine like terms: 0 + -91 = -91
-18x + x2 = -91

The x term is -18x.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18x + 81 + x2 = -91 + 81

Reorder the terms:
81 + -18x + x2 = -91 + 81

Combine like terms: -91 + 81 = -10
81 + -18x + x2 = -10

Factor a perfect square on the left side:
(x + -9)(x + -9) = -10

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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