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Find the factors of y2 – 7y + 12. -

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Question

Find the factors of y2 – 7y + 12.
Sum

Solution

We note 12 = 3 × 4 and 3 + 4 = 7.
Therefore,
y2 – 7y + 12 = y2 – 3y – 4y + 12
= y(y – 3) – 4 (y – 3)
= (y – 3)(y – 4)
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