-4x^2+16x+64=83

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Solution for -4x^2+16x+64=83 equation:


Simplifying
-4x2 + 16x + 64 = 83

Reorder the terms:
64 + 16x + -4x2 = 83

Solving
64 + 16x + -4x2 = 83

Solving for variable 'x'.

Reorder the terms:
64 + -83 + 16x + -4x2 = 83 + -83

Combine like terms: 64 + -83 = -19
-19 + 16x + -4x2 = 83 + -83

Combine like terms: 83 + -83 = 0
-19 + 16x + -4x2 = 0

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

Divide each side by '-4'.
4.75 + -4x + x2 = 0

Move the constant term to the right:

Add '-4.75' to each side of the equation.
4.75 + -4x + -4.75 + x2 = 0 + -4.75

Reorder the terms:
4.75 + -4.75 + -4x + x2 = 0 + -4.75

Combine like terms: 4.75 + -4.75 = 0.00
0.00 + -4x + x2 = 0 + -4.75
-4x + x2 = 0 + -4.75

Combine like terms: 0 + -4.75 = -4.75
-4x + x2 = -4.75

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -4.75 + 4

Reorder the terms:
4 + -4x + x2 = -4.75 + 4

Combine like terms: -4.75 + 4 = -0.75
4 + -4x + x2 = -0.75

Factor a perfect square on the left side:
(x + -2)(x + -2) = -0.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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