book Maths Puzzle Numerical Ability

can someone show me how to answer these two problems, thanks...
factor the sums or differences of two cubes..

b^3-8
x^3+8

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book Other Question
Reduce the ffaction 6x/12x to lowest terms Given the standard equation (y-2)^2=16(x+4) determine which conic section it represents, and name the vertex.