book Maths Puzzle Numerical Ability

x=1,y=-2
3x^2y-4xy^2+xy

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book Other Question

rewrite the equation (n-2)(3+(48/n))= $48+$22 in the standard form of a quadratic equation (ax^2+bx+c=0).......

im sooooo lost
Graph:
4x+1 is kess than 2(x-1)