use the quadratic formula to evaluate 2X^2 - 3X + 9=0.

Resolve:

1) use the quadratic formula to evaluate 2X^2 - 3X + 9=0.



2) Add 1/7 + 1/3 + 2.



3) Calculate 1/7 / 7. Is it = 1 or 1/49? Which is correct and why?



4) Calculate 1/7/ (1/2).

5) Calculate 2/ (1+ sqrt(3)) (sqrt is the square root function).