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Mathematics 15 Online
OpenStudy (keke1551):

Factor this polynomial completely. If it will not factor, type PRIME. x^2+13x+42

OpenStudy (ivettef365):

what multiple of 42, will add to 13 ???

OpenStudy (keke1551):

ummm , i dont know

OpenStudy (mathstudent55):

What _factors_ of 42 add to 13?

OpenStudy (mathstudent55):

Yes you know. This is just knowing the multiplication tables. What two numbers multiply to 42 and add to 13?

OpenStudy (keke1551):

7*6=42

OpenStudy (keke1551):

so the answer is (x+7)(x+6) ??

OpenStudy (mathstudent55):

You got it. See, you did know it.

OpenStudy (keke1551):

thanks

OpenStudy (mathstudent55):

wlcm

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