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Mathematics 8 Online
OpenStudy (anonymous):

100

jimthompson5910 (jim_thompson5910):

first compute the discriminant D = b^2-4ac D = (5)^2-4(2)(-7) D = ???

OpenStudy (anonymous):

25+56=81

jimthompson5910 (jim_thompson5910):

since that's a positive number, you will have 2 solutions it's a perfect square, so you will have 2 rational solutions

OpenStudy (anonymous):

oh ok so il have 2 real rational roots

jimthompson5910 (jim_thompson5910):

correct

jimthompson5910 (jim_thompson5910):

roots = solutions

OpenStudy (anonymous):

thank you

jimthompson5910 (jim_thompson5910):

yw

OpenStudy (anonymous):

what if the solution to a discriminant is zero? what will that be?

jimthompson5910 (jim_thompson5910):

you'll have one rational root (of multiplicity 2)

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