exam Maths Puzzle Numerical Ability

(x2 - 3X +2) - (3X2 - 5X -1) =

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exam Other Question

wich store sells beef at the higher price, nitas store sells 3 3/4 kilo for 1312.50 pesos or daines store that sells 2 3/5 kilos for 975 pesos, how much higher? Umm i dont understand how to do this problem at all and my teacher doesnt give help after class.
(4m^2-5m-6)+(3m^2+8m+9)