book Maths Puzzle Numerical Ability

graph the function and state the domain and range.

26. g(x)x^2-2x-15

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book Other Question

Please could somebody check this out.Solve the equation to find x in terms of s and t,in simplest form.(Assume that 3s-t is not =0)
3s(x-3s)=t(x-t)
I have arrived at x=3s-t. Is this correct? use long division to divide the following polynomials:
1) divide 3x^4-7x^2+2x-10 by x-3
2) divide 6x^4+20x^3+13x^2-5x+2 by 2x^2-1
3) divide 4x+y by 3x-2
4) divide x^3-11 by x^2