Question

.pls solve this answer in my book is -6​

Answer 1

Let p(x) = x⁴-3x³-px-5

By the conditions,

p(-2) = 23

p(-2) = (-2)⁴-3×(-2)³-(p×-2)-5 (putting x=-2)

23 = 16+24+2p-5

2p = 23-35 = -12

p = -6

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