exam Maths Puzzle Numerical Ability

Factor by grouping
18a^3 - 24a^2b + 15ab^2 - 20b^3

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exam Other Question

Profit: A small appliance manufacturer finds that the profit P (in dollars) generated by producing x microwave ovens per week is given by the formula
P=1/10(x)(300-x) provided th The Great Pyramid at Giza was origionally 483 feet tall, and it had a swuare base that was 756 feet on a side. It was built from rectangular stone blocks measuring 7 feet by 7 feet