book Maths Puzzle Numerical Ability

can you factor x squared - x - 20 ? Thank you. Amanda

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t - 1 t + 2 t2</sup> + t-2</sup>
Please help me figure out this problem. I think it may have no solution.</PRE> A car was to be sold at a 20% discount, which amounted to $2,200. How much would the car sell for after the discount?