Show that x4+4x2+6 has no zeroes
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given ,f(x)=×4+4×+6 has no zero
now for a polynomial to have zeros,its root must be real
=a,B=-b#√D
=-b#√b2-4ac
2a
= -4#√16-4×6×1
2(1)
= -4#√16-24
2
=-4#√-8
2
now for a polynomial to have zeros,its root must be real
=a,B=-b#√D
=-b#√b2-4ac
2a
= -4#√16-4×6×1
2(1)
= -4#√16-24
2
=-4#√-8
2
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