exam Maths Puzzle Numerical Ability

Divide.

8x to the 3rd power - 6x squared + 2x OVER 4x + 1

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exam Other Question

f(x)=1/4x+2 if there are 6*10^9 people on the earth and there is enough freshwater to provide each person with 8.79*10^5 L, how much freahwater is on the earth?

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