-6=5x^2-9x+12

Solution for -6=5x^2-9x+12 equation:

Simplifying
-6 = 5x2 + -9x + 12

Reorder the terms:
-6 = 12 + -9x + 5x2

Solving
-6 = 12 + -9x + 5x2

Solving for variable 'x'.

Combine like terms: -6 + -12 = -18
-18 + 9x + -5x2 = 12 + -9x + 5x2 + -12 + 9x + -5x2

Reorder the terms:
-18 + 9x + -5x2 = 12 + -12 + -9x + 9x + 5x2 + -5x2

Combine like terms: 12 + -12 = 0
-18 + 9x + -5x2 = 0 + -9x + 9x + 5x2 + -5x2
-18 + 9x + -5x2 = -9x + 9x + 5x2 + -5x2

Combine like terms: -9x + 9x = 0
-18 + 9x + -5x2 = 0 + 5x2 + -5x2
-18 + 9x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-18 + 9x + -5x2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
3.6 + -1.8x + x2 = 0

Move the constant term to the right:

Add '-3.6' to each side of the equation.
3.6 + -1.8x + -3.6 + x2 = 0 + -3.6

Reorder the terms:
3.6 + -3.6 + -1.8x + x2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + -1.8x + x2 = 0 + -3.6
-1.8x + x2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
-1.8x + x2 = -3.6

The x term is -1.8x.  Take half its coefficient (-0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
-1.8x + 0.81 + x2 = -3.6 + 0.81

Reorder the terms:
0.81 + -1.8x + x2 = -3.6 + 0.81

Combine like terms: -3.6 + 0.81 = -2.79
0.81 + -1.8x + x2 = -2.79

Factor a perfect square on the left side:
(x + -0.9)(x + -0.9) = -2.79

Can't calculate square root of the right side.

The solution to this equation could not be determined.