book Maths Puzzle Numerical Ability

[2X-7][2X^2+3X-11]

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book Other Question

the time it takes to complete a certain job varies inversely to the number of people working on that job. If it takes 36 hrs for 7 carpenters to frame a house, how long will it take 54 carpenters to do the same job? eight to the second power minus three to the second power times six divided by eighteen plus nine