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Pipdastr
@Pipdastr
July 2022
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(7+y)-y²-14y-49=?????
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Dikrba
(7+у)-у2-14у-49=(7+у) - (у2 + 14у+49)= (7+у) - (у+7)2=(у+7)(1-(у+7))= (у+7)(-у-6)= -у2 - 6у - 7у -42 = -у2 -13у - 42.
Если ищем у:
-у2-13у-42=0
у2 + 13у + 42=0
у= -6 или у= -7
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Answers & Comments
Если ищем у:
-у2-13у-42=0
у2 + 13у + 42=0
у= -6 или у= -7