Simplify the function.
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according to the fundamental theorem of algebra, which polynomial function has exactly 8 roots?
(1) f(x)=(3x^2-4x-5)(2x^6-5)
(2) f(x)=(3x^4+2x)^4
(3) f(x)=(4x^2-7)^3
(4) f(x)=(6x^8-4x^5-1)(3x^2-4)
Which function has only one x-intercept at (−6, 0)?
i) f(x)=x2(x+6),
ii) f(x)=2x(x-6),
iii)f(x)=(x+6)3,
iv)f(x)=x2+3x+2.