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Mathematics 14 Online
OpenStudy (darkbluechocobo):

Ellipses help please

OpenStudy (darkbluechocobo):

OpenStudy (darkbluechocobo):

@hartnn

OpenStudy (anonymous):

find distance from each focus to the point and add them up

OpenStudy (anonymous):

PF1 + PF2

OpenStudy (darkbluechocobo):

could you walk me through o.o

OpenStudy (anonymous):

what is the distance from (12,0) to (9,0) ? and what is the distance from (-12,0) to (9,0) ?

OpenStudy (darkbluechocobo):

3 and 21

OpenStudy (darkbluechocobo):

25?

OpenStudy (anonymous):

notice that it's symmetric, so you should have had 15 and 15. Thus 30

OpenStudy (darkbluechocobo):

OH YOU ADD IT *facepalm* so 12+3 and -12+21?

OpenStudy (anonymous):

no, the distance form (12,0) to (9,0) is 15 the distance from (-12,0) to (9,0) is also 15 so 15 + 15 = 30

OpenStudy (darkbluechocobo):

Ohhh i see that now *facepalm*

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