x^2-18x+30=-100

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Solution for x^2-18x+30=-100 equation:


Simplifying
x2 + -18x + 30 = -100

Reorder the terms:
30 + -18x + x2 = -100

Solving
30 + -18x + x2 = -100

Solving for variable 'x'.

Reorder the terms:
30 + 100 + -18x + x2 = -100 + 100

Combine like terms: 30 + 100 = 130
130 + -18x + x2 = -100 + 100

Combine like terms: -100 + 100 = 0
130 + -18x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-130' to each side of the equation.
130 + -18x + -130 + x2 = 0 + -130

Reorder the terms:
130 + -130 + -18x + x2 = 0 + -130

Combine like terms: 130 + -130 = 0
0 + -18x + x2 = 0 + -130
-18x + x2 = 0 + -130

Combine like terms: 0 + -130 = -130
-18x + x2 = -130

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 = -130 + 81

Reorder the terms:
81 + -18x + x2 = -130 + 81

Combine like terms: -130 + 81 = -49
81 + -18x + x2 = -49

Factor a perfect square on the left side:
(x + -9)(x + -9) = -49

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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