book Maths Puzzle Numerical Ability

This is the promblem that I need some help on. x squared + x-6 divided by x cubed + x squared - 2x times x squared + 6x+8 divided by x squared + 7x+12 divided by x-2 divided by x c

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book Other Question

Find the slope of the line for: "y= -5" and also "y=9x+2". In base 11 - what is the largest/smallest/differenct of a number represented by a 3-digit numeral in the form abc where a does not equal 0.

largest 999
smallest 100
difference 899

is this correct?? Thanks Caroline