If -1 is a zero of the polynomial f(x)-x²-7x-8, then find other zero.
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x^2+x-8x-8=0
x(x+1)-8(x+1)=0
(x-8)=0 (x+1)=0
x=8 x=-1
x(x+1)-8(x+1)=0
(x-8)=0 (x+1)=0
x=8 x=-1
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