book Maths Puzzle Numerical Ability

Find the x intercepts of y=x^2-4x+4

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book Other Question

Subtract and simplify:

2/x^2 + 6x - 27 minus 1/x^2 + 12x + 27 The demand and supply equations for a certain item are given by D=-5p+40, S=-p^2+30p-8. Find the equilibrium price.