exam Maths Puzzle Numerical Ability

solve for Z: 3/2z^2=4z+1

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exam Other Question

8x^5-14x^4-22x^3+57x^2-35x+6 I managed to get to (x-1)(x+2)8x^3-22x^2+16x-3 and now I am totally stuck. Thanks for your help I have 100 coins that equal $5.00. None are nickels. What coins do I have?