1. Simplify (a2 – 13a +30)÷ (a – 10).

    a2 - 13a + 30a-10=a2 - 10a - 3a + 30a-10=aa-10 - 3a-10a-10=a-3a-10a-10=a-3

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a2-13a+30/a-10
= a-3( when divided by a-10)
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