x=4x^2-24x+81

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Solution for x=4x^2-24x+81 equation:


Simplifying
x = 4x2 + -24x + 81

Reorder the terms:
x = 81 + -24x + 4x2

Solving
x = 81 + -24x + 4x2

Solving for variable 'x'.

Reorder the terms:
-81 + x + 24x + -4x2 = 81 + -24x + 4x2 + -81 + 24x + -4x2

Combine like terms: x + 24x = 25x
-81 + 25x + -4x2 = 81 + -24x + 4x2 + -81 + 24x + -4x2

Reorder the terms:
-81 + 25x + -4x2 = 81 + -81 + -24x + 24x + 4x2 + -4x2

Combine like terms: 81 + -81 = 0
-81 + 25x + -4x2 = 0 + -24x + 24x + 4x2 + -4x2
-81 + 25x + -4x2 = -24x + 24x + 4x2 + -4x2

Combine like terms: -24x + 24x = 0
-81 + 25x + -4x2 = 0 + 4x2 + -4x2
-81 + 25x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-81 + 25x + -4x2 = 0

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

Divide each side by '-4'.
20.25 + -6.25x + x2 = 0

Move the constant term to the right:

Add '-20.25' to each side of the equation.
20.25 + -6.25x + -20.25 + x2 = 0 + -20.25

Reorder the terms:
20.25 + -20.25 + -6.25x + x2 = 0 + -20.25

Combine like terms: 20.25 + -20.25 = 0.00
0.00 + -6.25x + x2 = 0 + -20.25
-6.25x + x2 = 0 + -20.25

Combine like terms: 0 + -20.25 = -20.25
-6.25x + x2 = -20.25

The x term is -6.25x.  Take half its coefficient (-3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
-6.25x + 9.765625 + x2 = -20.25 + 9.765625

Reorder the terms:
9.765625 + -6.25x + x2 = -20.25 + 9.765625

Combine like terms: -20.25 + 9.765625 = -10.484375
9.765625 + -6.25x + x2 = -10.484375

Factor a perfect square on the left side:
(x + -3.125)(x + -3.125) = -10.484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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