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Verified answer
No 18 / 3a+6 × a+2 / 4
= 8a+16 / 12a+24
= 8(a+2) / 12(a+2)
= ⅔
No 2
9 a²-16
------- × ---------
a + 4 3
= 3 / a+4 × (a+4)(a-4)
= 3 × a-4
= 3a-12
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