If a² - 3a + 1 = 0, then what is the
value of a³ +
1/а³
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Step-by-step explanation:
a-3a+1=0
a+1=3a
a(a+1/a)=3a
(a+1/a)=3
on cubic both side,
(a+1/a)³=3³
a³+1/a³+3•a•1/a(a+1/a)=27
a³+1/a³+3(3)=27
a³+1/a³+9=27
a³+1/a³= 18
#666
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