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How do I get this answer(Circled)(Guys help my exam starts in few hours)​

Answer»

ong>Answer:

how you get means

Step-by-step EXPLANATION:

+Y2 and -2y2 is there and -2y2 will become +2y2

and +y2 +2y2 =(+)(+) =+

SOOO y2 + 2y2 =3y2



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