3x^2+18x+243=76

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Solution for 3x^2+18x+243=76 equation:


Simplifying
3x2 + 18x + 243 = 76

Reorder the terms:
243 + 18x + 3x2 = 76

Solving
243 + 18x + 3x2 = 76

Solving for variable 'x'.

Reorder the terms:
243 + -76 + 18x + 3x2 = 76 + -76

Combine like terms: 243 + -76 = 167
167 + 18x + 3x2 = 76 + -76

Combine like terms: 76 + -76 = 0
167 + 18x + 3x2 = 0

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

Divide each side by '3'.
55.66666667 + 6x + x2 = 0

Move the constant term to the right:

Add '-55.66666667' to each side of the equation.
55.66666667 + 6x + -55.66666667 + x2 = 0 + -55.66666667

Reorder the terms:
55.66666667 + -55.66666667 + 6x + x2 = 0 + -55.66666667

Combine like terms: 55.66666667 + -55.66666667 = 0.00000000
0.00000000 + 6x + x2 = 0 + -55.66666667
6x + x2 = 0 + -55.66666667

Combine like terms: 0 + -55.66666667 = -55.66666667
6x + x2 = -55.66666667

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = -55.66666667 + 9

Reorder the terms:
9 + 6x + x2 = -55.66666667 + 9

Combine like terms: -55.66666667 + 9 = -46.66666667
9 + 6x + x2 = -46.66666667

Factor a perfect square on the left side:
(x + 3)(x + 3) = -46.66666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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