osa16
osa16 osa16
  • 08-11-2022
  • Mathematics
contestada

please can someone solve this and tell me how at the end, it's gives -2 alpha beta instead of +2 alpha beta

I need answers ASAP pleeeeaase!!!!!
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please can someone solve this and tell me how at the end its gives 2 alpha beta instead of 2 alpha betaI need answers ASAP pleeeeaase class=

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