3root5+ -root 5 + root 180
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root 180 = 6 root 5
therefore
3 root 5 + root 5 + 6 root 5 = 8 root 5
if it is -root5 then, use iota i.e. root -1
put the value of
-root 5 =2.23i
therefore
3 root 5 + root 5 + 6 root 5 = 8 root 5
if it is -root5 then, use iota i.e. root -1
put the value of
-root 5 =2.23i
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