-4(x^2-5x+6.25)-2.25=0

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Solution for -4(x^2-5x+6.25)-2.25=0 equation:


Simplifying
-4(x2 + -5x + 6.25) + -2.25 = 0

Reorder the terms:
-4(6.25 + -5x + x2) + -2.25 = 0
(6.25 * -4 + -5x * -4 + x2 * -4) + -2.25 = 0
(-25 + 20x + -4x2) + -2.25 = 0

Reorder the terms:
-25 + -2.25 + 20x + -4x2 = 0

Combine like terms: -25 + -2.25 = -27.25
-27.25 + 20x + -4x2 = 0

Solving
-27.25 + 20x + -4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
6.8125 + -5x + x2 = 0

Move the constant term to the right:

Add '-6.8125' to each side of the equation.
6.8125 + -5x + -6.8125 + x2 = 0 + -6.8125

Reorder the terms:
6.8125 + -6.8125 + -5x + x2 = 0 + -6.8125

Combine like terms: 6.8125 + -6.8125 = 0.0000
0.0000 + -5x + x2 = 0 + -6.8125
-5x + x2 = 0 + -6.8125

Combine like terms: 0 + -6.8125 = -6.8125
-5x + x2 = -6.8125

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -6.8125 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -6.8125 + 6.25

Combine like terms: -6.8125 + 6.25 = -0.5625
6.25 + -5x + x2 = -0.5625

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = -0.5625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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