SOLUTION: can someone please check this for me please? 7x^2+18x-9 x=-b+-sqrt{{{b^2-4ac}}}/2a x=-18+-sqrt{{{18^24*7*9}}}/2*7 x=(-18+24)/2*7 x=6/14=3/7 x=-42/14=-3 x=7

Algebra ->  Radicals -> SOLUTION: can someone please check this for me please? 7x^2+18x-9 x=-b+-sqrt{{{b^2-4ac}}}/2a x=-18+-sqrt{{{18^24*7*9}}}/2*7 x=(-18+24)/2*7 x=6/14=3/7 x=-42/14=-3 x=7      Log On


   

Question 81438: can someone please check this for me please?
7x^2+18x-9
x=-b+-sqrtb%5E2-4ac/2a
x=-18+-sqrt18%5E24%2A7%2A9/2*7
x=(-18+24)/2*7
x=6/14=3/7
x=-42/14=-3
x=7
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
can someone please check this for me please?
7x^2+18x-9
x=-b+-sqrtb%5E2-4ac/2a
x = [-18+-sqrt18^2-4*7*-9]/14
x = [-18+-sqrt(576)]/14
x = [-18+-24]/14
x= [-18+24]/14 or x=[-18-24]/14
x= [3/7] or x= -42/14 = -3
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Cheers,
Stan H.