a^2+b^2/9-2ab/3+8a-8b/3+16: Factorise
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Factorise.
(1) x2 + 9x + 18
(2) x2 − 10x + 9
(3) y2 + 24y + 144
(4) 5y2 + 5y − 10
(5) p2 − 2p − 35
(6) p2 − 7p − 44
(7) m2 − 23m + 120
(8) m2 − 25m + 100
(9) 3x2 + 14x + 15
(10) 2x2 + x − 45
(11) 20x2 − 26x + 8
(12) 44x2 − x − 3
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