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Question

Tick (โœ“) the correct answer:
3 + 23y − 8y2 = ?
(a) (1 − 8y)(3 + y)
(b) (1 + 8y)(3 − y)
(c) (1 − 8y)(y − 3)
(d) (8y − 1)(y + 3)

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Solution

(b) (1 + 8y)(3 − y)

3+23y-8y2=3+24y-y-8y2=3(1+8y)-y(1+8y)=(3-y)(1+8y)

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