-2x^2+7x=9

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Solution for -2x^2+7x=9 equation:


Simplifying
-2x2 + 7x = 9

Reorder the terms:
7x + -2x2 = 9

Solving
7x + -2x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + 7x + -2x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 7x + -2x2 = 0

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

Divide each side by '-2'.
4.5 + -3.5x + x2 = 0

Move the constant term to the right:

Add '-4.5' to each side of the equation.
4.5 + -3.5x + -4.5 + x2 = 0 + -4.5

Reorder the terms:
4.5 + -4.5 + -3.5x + x2 = 0 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + -3.5x + x2 = 0 + -4.5
-3.5x + x2 = 0 + -4.5

Combine like terms: 0 + -4.5 = -4.5
-3.5x + x2 = -4.5

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 = -4.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = -4.5 + 3.0625

Combine like terms: -4.5 + 3.0625 = -1.4375
3.0625 + -3.5x + x2 = -1.4375

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = -1.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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