Question

$factorise(a2 - 3a)(a2 - 3a + 7) + 10$
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Answer 1

Answer:

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Answer 2

Answer:

a=5 or 2

(a2-3a)(a2-3a)+10=0

-a(-a-7a)+10=0

$a { }^{2} - 7a + 10 = 0 \\ a {}^{2} - 5a - 2a + 10 = 0 \\ a(a - 5) - 2(a - 5) = 0 \\ (a - 5)(a - 2) = 0 \\ a = 5 \: or \: a = 2$