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OpenStudy (anonymous):

find the discrimiant

OpenStudy (anonymous):

OpenStudy (anonymous):

the discriminant is b^2-4ac where a=8 b=18 c=-5 18^2 - 4(8)(-5) =484

OpenStudy (anonymous):

OpenStudy (anonymous):

a=-12 b=5 c=2 5^2 - 4(-12)(2) =121

OpenStudy (anonymous):

OpenStudy (anonymous):

a=9 b=-6 c=-4 -6^2-4(9)(-4) =108

OpenStudy (anonymous):

its asking me to find the solution for the last two

OpenStudy (anonymous):

using the quadratic equation?

OpenStudy (anonymous):

iive already work out the problem i just need someone to do it so i can see what they get

OpenStudy (anonymous):

did you use the quadratic equation though?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

for the 2nd to last = -5 (+or -) squareroot(121)/-24 so x = -1/4 or x = 2/3

OpenStudy (anonymous):

last one 6(+or -) squareroot(108)/16 x = (1+root3)/3 or x = (1-root3)/3

OpenStudy (anonymous):

did you get that?

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

OpenStudy (anonymous):

a=1 b=3 c=3 no solutions to the discriminant as it is negative ( what level maths are you at) therefore there is no solution

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