Substitution
(7)
[tex]f(n) = 6( - 8) {}^{2} + 54( - 8) + 46[/tex]
=-2
(8)
[tex]f(n) = - 4(7) {}^{3} + 28(7) {}^{2} - 5(7) + 40[/tex]
=5
(9)
[tex]f(n) = 4( - 2) {}^{4} + ( - 2) {}^{3} - 9( - 2) {}^{2} + 3( - 2) - 15 [/tex]
=-1
(10)
[tex]f(a) = - 7(6) {}^{3} + 41(6) {}^{2} + 35 [/tex]
=-1
(11)
[tex]f(n) = (3) {}^{3} - 4(3) {}^{2} - 5(3) + 26 [/tex]
=2
(12)
[tex]f(x) = 2(5) {}^{2} + 7( - 5) - 30 [/tex]
=-15
Hope this will help you
