exam Maths Puzzle Numerical Ability

Multiply, using the vertical method.

(2r-3s)(4r squared + 6rs + 9s squared)

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exam Other Question

How would you write this rational expression in lowest terms?

a^2-9/18-2a^2 The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The formula relating Population "P"