7+3x(6-x)=54

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Solution for 7+3x(6-x)=54 equation:


Simplifying
7 + 3x(6 + -1x) = 54
7 + (6 * 3x + -1x * 3x) = 54
7 + (18x + -3x2) = 54

Solving
7 + 18x + -3x2 = 54

Solving for variable 'x'.

Reorder the terms:
7 + -54 + 18x + -3x2 = 54 + -54

Combine like terms: 7 + -54 = -47
-47 + 18x + -3x2 = 54 + -54

Combine like terms: 54 + -54 = 0
-47 + 18x + -3x2 = 0

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

Divide each side by '-3'.
15.66666667 + -6x + x2 = 0

Move the constant term to the right:

Add '-15.66666667' to each side of the equation.
15.66666667 + -6x + -15.66666667 + x2 = 0 + -15.66666667

Reorder the terms:
15.66666667 + -15.66666667 + -6x + x2 = 0 + -15.66666667

Combine like terms: 15.66666667 + -15.66666667 = 0.00000000
0.00000000 + -6x + x2 = 0 + -15.66666667
-6x + x2 = 0 + -15.66666667

Combine like terms: 0 + -15.66666667 = -15.66666667
-6x + x2 = -15.66666667

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 = -15.66666667 + 9

Reorder the terms:
9 + -6x + x2 = -15.66666667 + 9

Combine like terms: -15.66666667 + 9 = -6.66666667
9 + -6x + x2 = -6.66666667

Factor a perfect square on the left side:
(x + -3)(x + -3) = -6.66666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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