(a) $4, 7, 12$ (Substitute $n=1, 2, 3$) (b) $n^2 + 3 = 100 \Rightarrow n^2 = 97$. $\sqrt97$ is not an integer. No.
$$ \fracx^2 - 9x^2 + 4x + 3 $$ (3 Marks) q8maths
(2 Marks) There are 12 blue counters in the bag. (b) Work out the total number of counters in the bag. (2 Marks) (a) $4, 7, 12$ (Substitute $n=1, 2, 3$)