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Maths Puzzle
Numerical Ability
multiply:
5x+5/x-2*2x^2-8x+8/x^2-1
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book Other Question
Find all the solutions of the equation. Check your soulutions in the original equation.
x^4-x^3+x-1=0
A group of 10 6-volt & 12-volt batteries are wired in series. The sum of their voltages is 84 volts. How many of each type of battery are used.