allyza_obico
by foil method:
(15x + 7y) (15x-7y)
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fiddlearound
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where are you stuck with it ?
fiddlearound
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would you like to try, so we see where the difficulty is ?
allyza_obico
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??
allyza_obico
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i need a answer plss
Mimi_x3
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225x^2 - 49y^2
allyza_obico
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with solution plss
successboye79
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arctan(-1)
fiddlearound
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Mimi , wolfram didn't use FOIL though :)
Mimi_x3
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lols i know, its obvious that she just wanted the answer (:
fiddlearound
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allyza do you want to try doing the FOIL method ?
fiddlearound
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First
Outer
Inner
Last
Only 4 easy things to do ...
fiddlearound
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we can do it step by step , if you want to
fiddlearound
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and we even know what the answer will be in the end :)
Mimi_x3
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|dw:1316602830211:dw|
autumn.epic
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(15x + 7y) (15x-7y)
(F) 15x * 15x = __
(O) 15x * -7y = __ (add this one...)
(I) 7y * 15x =__ (...and this one together for your xy value.)
(L) 7y * -7y =__
so, F (+/-) O+I (+/-) L
Mimi_x3
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225x^2 - 49y^2 btw
fiddlearound
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|dw:1316603089681:dw|