Срочно!!!!!!!!!!!!!!!!

Question

Срочно!!!!!!!!!!!!!!!!

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Answer 1

a)  6y^2-( -3+2y-2y^2)= 6y^2+3-2y+2y^2= 8y^2+3-2y

б)  9+(y^2-4)+5y=9+y^2-4+5Y=5+y^2+5y

в)  2y-(5-3y^2)+(4-y^2)=2y-5+3y^2+4-y^2=2y-1+2y^2

г)  6-(9-2y^2)+(6y^2-7y+3)+7y=6-(9-2y^2)+6y^2-7y+3+7y=6-9+2y^2+6y^2+3=0+8y^2=8y^2