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Byju's Answer
Standard VIII
Mathematics
Algebraic Identities
If px=5 x-4 x...
Question
If p(x) = 5x – 4x
2
+ 3 then p(–1) =?
(a) 2
(b) –2
(c) 6
(d) –6
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Solution
p(x) = 5x – 4x
2
+ 3
Putting x = –1 in p(x), we get
p(–1) = 5 × (–1) – 4 × (–1)
2
+ 3 = –5 – 4 + 3 = –6
Hence, the correct answer is option (d).
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