x^2-7x=-98

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Solution for x^2-7x=-98 equation:


Simplifying
x2 + -7x = -98

Reorder the terms:
-7x + x2 = -98

Solving
-7x + x2 = -98

Solving for variable 'x'.

Reorder the terms:
98 + -7x + x2 = -98 + 98

Combine like terms: -98 + 98 = 0
98 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-98' to each side of the equation.
98 + -7x + -98 + x2 = 0 + -98

Reorder the terms:
98 + -98 + -7x + x2 = 0 + -98

Combine like terms: 98 + -98 = 0
0 + -7x + x2 = 0 + -98
-7x + x2 = 0 + -98

Combine like terms: 0 + -98 = -98
-7x + x2 = -98

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -98 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -98 + 12.25

Combine like terms: -98 + 12.25 = -85.75
12.25 + -7x + x2 = -85.75

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = -85.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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