Resolva as seguintes equaçoes do segundo grau ( completas e incompletas)

a) 9x²-4=0

b) 5x²-45=0

c) x²+x(2x-15)=0

d) (x²+1)²=7+x

E) 2x²-x+1=0

F) y+2+ 2 = -1

----- ----- -----

2 y-2 2

Urgente preciso entregar esse trabalho d erecuperaçao amnah me ajudem pf :/

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