Question

Find the value of the x^3 + 7x^2 + 16x + 7 at

X=1/
root9+4root5​

Answer 1

Answer:

x^3+7x^2+16x+7

=1^3+7×1^2+16×1+7

=1+7×1+16+7

=1+7+16+7

=31

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