Use the quadratic equation:
trying to figure out how my teacher got this answer using the quadratic equation.
Problem: 3x^2 + 2x -6
This is how he did it in class
3x^2 + 2x - 6 = 0
x= -2 +- square root 4-4(3)(-6) / 2(3)
x= -2 +- square root 4 * 19 / 6
= -1/3 + square root 19/3
= square root 19-4 / 3
That is the final answer but I dont know how he got that.
Can anyone please help