Question

Hi,
I can't seem to figure out this equation. It won't check at =0 with the calc.
the formula we're supposed to use:
x= - b + or - radical b^2 - 4 a c / 2a
the equation:
x^2 + 7x -3 = 0
I'm getting x= - 7 +/- square root of 73 / 4
please help thanks!

Answer 1

What did you use for a, b, and c?

Answer 2

a=1 b= 7 c=3

Answer 3

i realized i accidently put the wrong # in for a but even though i fixed it, it still wont check with the ti calc.

Answer 4

\[x=\frac{-7\pm \sqrt{49-4(1)(-3)}}{2}\]

Answer 5

c=-3

Answer 6

thanx!

Answer 7

yw