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February 1, 2015

February 1, 2015

Posted by **Cassie** on Saturday, June 6, 2009 at 2:22pm.

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 3:56pmThe answer is (b), x1=3/2, x2=-7

Check that you use the formula

x=(-b+/-sqrt(B^{2}-4ac))/(2a)

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