2x^2-7x=-105

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Solution for 2x^2-7x=-105 equation:


Simplifying
2x2 + -7x = -105

Reorder the terms:
-7x + 2x2 = -105

Solving
-7x + 2x2 = -105

Solving for variable 'x'.

Reorder the terms:
105 + -7x + 2x2 = -105 + 105

Combine like terms: -105 + 105 = 0
105 + -7x + 2x2 = 0

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

Divide each side by '2'.
52.5 + -3.5x + x2 = 0

Move the constant term to the right:

Add '-52.5' to each side of the equation.
52.5 + -3.5x + -52.5 + x2 = 0 + -52.5

Reorder the terms:
52.5 + -52.5 + -3.5x + x2 = 0 + -52.5

Combine like terms: 52.5 + -52.5 = 0.0
0.0 + -3.5x + x2 = 0 + -52.5
-3.5x + x2 = 0 + -52.5

Combine like terms: 0 + -52.5 = -52.5
-3.5x + x2 = -52.5

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = -52.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = -52.5 + 3.0625

Combine like terms: -52.5 + 3.0625 = -49.4375
3.0625 + -3.5x + x2 = -49.4375

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = -49.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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