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Mathematics 15 Online
OpenStudy (anonymous):

is this equation PRIME? 1X^(2) + 10X + 9 = 0

OpenStudy (anonymous):

No. Think about the factors of 9: 1x9, 3x3. Does 1+9 or 3+3=10?

OpenStudy (yuki):

do you know how to decide whether it is prime or not ?

OpenStudy (anonymous):

yeha didn't think of 1 and 9 *smacks head*

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