calcule,no conjunto dos números reais,as raízes das equaçãoões:?

a) (2x²+2x-4)(x-8)=0

b) (-x²/2-3x+8 )(3x²-12x)=0 esse /2 e embaixo do -x²

c) (-x²+1)(7x²-2x+5)=0

d)X²+6x+5=0 x+1

Esse x+1 e embaixo do X²+6x+5=0

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