Question

1. evaluate $4a^{3}+a^{2}-9a - 2$ when $a = 3$

Explanation:

Step1: Substitute $a=3$ into expression

$4(3)^3 + (3)^2 - 9(3) - 2$

Step2: Calculate each power term

$4(27) + 9 - 9(3) - 2$

Step3: Perform multiplication operations

$108 + 9 - 27 - 2$

Step4: Compute final arithmetic sum

$108+9=117; 117-27=90; 90-2=88$

Answer:

88