Posted by Cassie on Saturday, June 6, 2009 at 2:22pm.
Use the quadratic formula to solve the equation. Give exact answers.
2x^2 + 11x  21 = 0
a) 3/2, 7
b) 3/2, 7
c) 3/2, 7
d) 3/2, 7
I could not get any of these answers.

Algebra  MathMate, Saturday, June 6, 2009 at 3:56pm
The answer is (b), x1=3/2, x2=7
Check that you use the formula
x=(b+/sqrt(B^{2}4ac))/(2a)