among the following a polynomial is a)x2 - 6x + 4 b)5×-6-9×3-7 c)5×1 - -9 9 d)-a[a-5xa+x]
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Answer:
a) and d)
Step-by-step explanation:
a) x2-6x+4
d) a(a-5xa+x) = a2-5xa2+ax
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