Factorise X^2-X-20

(X+4)(X-5)

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Answered by Stephen W. Maths tutor

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Nadia has £5 to buy pencils and rulers. Pencils are 8p each. Rulers are 30p each. She says “I will buy 15 pencils. Then I will buy as many rulers as possible. With my change I will buy more pencils.” How many pencils and how many rulers does she buy?


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