3² + 20 ÷ 2² = 9 + (20 ÷ 4) = 14.
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4x + 20
It simplifies to 5a+4 !
(a2 + 5a + 6)/(a - 2) = (a + 2)*(a 3)/(a - 2) which cannot be simplified further. It can, however be written as (a2 - 2a + 7a - 14 + 20)/(a - 2) which is (a + 7) + 20/(a - 2)
2752 = 75625 42 = 16 32 = 9 22 = 4 75625/16 + 9 + 2 = 4737.5625
(9x)2 +9x/(45x)2 +81= 9+9x/86