Question

Given polynomial p (t) = t^4 - t^3 +t^3 +6, then p(-1)is
a) 6.
b) 9
c) 3
d) -1​

Answer 1

$p(t) = t {}^{4} - t {}^{3} + t {}^{2} + 6$

$p( - 1) = - 1{}^{4} - ( - 1){ }^{3} + ( - 1) {}^{2} + 6$

$p( - 1) = 1 - ( - 1) + 1 + 6$

$p( - 1) = 9$

( b ) is the correct answer