\( 9\left(x^{2}-2\right) \)
\( 9x^{2} - 9(2) = 9x^{2} - 18 \)
Step 1 :\( 9\left(x^{2}-2\right) = 9x^{2} - 9(2) \)
Step 2 :\( 9x^{2} - 9(2) = 9x^{2} - 18 \)