exam Maths Puzzle Numerical Ability

State which method should be applied as the first step for factoring the
polynomial.
(x + 7y)^2 - 100

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exam Other Question

A is 20 years older than B. He is also 6 times as old as B. find their ages. Carpet(yd2) 10| 15| 20| 30
Totalcost($)199.50|299.25|399.00|590.50

from the table, what can you say about the relationship between the amount of carpet and the total c