Factorise
(i) a? +
- 18
a²
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2
Answer:
a= 6,3
Step-by-step explanation:
a2 -9a + 18
a2 -( 3+ 6)a +18
a2 - 3a - 6a + 18
a (a - 3) - 6 (a - 3)
( a - 3 ) ( a - 6 )
a = 3,6
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