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Question
Find the value of the polynomial 5x – 4x2 + 3 at x = –1.
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Solution
p(x) = 5x – 4x2 + 3
x = –1
p(–1) = 5(–1) – 4(–1)2 + 3
= –5 – 4 + 3
= -9 + 3
= –6
Thus, the value of 5x – 4x2 + 3 at x = –1 is –6.
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