How would you solve 2x² - 12x equals 18?

Answer 1

That doesn't factor neatly. Applying the quadratic formula, we find two imaginary solutions: (-1 plus or minus one third itimes the square root of 7) divided by 4.

x = -0.25 + 0.22047927592204922i

x = -0.25 - 0.22047927592204922i

where i is the square root of negative one.

Answer 2

x2 - 9x - 18 doesn't factor neatly like x2 - 9x + 18 does. Applying the quadratic equation, we find two real solutions: (9 plus or minus 3 times the square root of 17) divided by 2.

x = 10.68465843842649

x = -1.68465843842649

Answer 3

For simplification, factor out 2 from each term:

X2 - 6X = 9

X2 - 6X - 9= 0

If you want to solve for X:

(X-3)(X-3) = 0

X = 3