book Maths Puzzle Numerical Ability

(x^2-x-4)^(3/4)-2=6

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book Other Question

Factor

x4</sup> - x3</sup> - 7x2</sup> + x + 6 = 0

Possible answers:

a. (x-6)
b. (x-3)
c. (x-2)
d. (x+6)</PRE>
I need help solving this problem, please. I haven't taken math in years and I don't even know where to begin. Thanks in advance.

2-(8y-t)/4y+(7y+6t)/3y