5Q^2-9Q+18=

Solution for 5Q^2-9Q+18= equation:

Simplifying
5Q2 + -9Q + 18 = 0

Reorder the terms:
18 + -9Q + 5Q2 = 0

Solving
18 + -9Q + 5Q2 = 0

Solving for variable 'Q'.

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

Divide each side by '5'.
3.6 + -1.8Q + Q2 = 0

Move the constant term to the right:

Add '-3.6' to each side of the equation.
3.6 + -1.8Q + -3.6 + Q2 = 0 + -3.6

Reorder the terms:
3.6 + -3.6 + -1.8Q + Q2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + -1.8Q + Q2 = 0 + -3.6
-1.8Q + Q2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
-1.8Q + Q2 = -3.6

The Q term is -1.8Q.  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.
-1.8Q + 0.81 + Q2 = -3.6 + 0.81

Reorder the terms:
0.81 + -1.8Q + Q2 = -3.6 + 0.81

Combine like terms: -3.6 + 0.81 = -2.79
0.81 + -1.8Q + Q2 = -2.79

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

Can't calculate square root of the right side.

The solution to this equation could not be determined.