exam Maths Puzzle Numerical Ability

3x2+10x+5=0
I need this to be simplified as much as possible. Thank You.

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exam Other Question

A shopkeeper sold 100 fruits (3 types). Apple was sold for 10 cents each,Banana 1 Euro each and Orange sold for 3 Euro each. The total amount collected for the 100 fruits was 100 Euros. How many fruits of each type were sold? thanks Factor 7x^2+49x+42