Question

If f(z) =z^2-3ROOT 2Z - 1, THEN FIND f(3root2

Answer 1

$f(z) = {z}^{2} - 3 \sqrt{2} z - 1 \\ f(3 \sqrt{2} ) = {(3 \sqrt{2}) }^{2} - 3 \sqrt{2} \times 3 \sqrt{2} - 1 \\ 18 - 18 - 1 = - 1$