The value of $(3+2\sqrt{2})^{-3}+(3-2\sqrt{2})^{-3}$ is :
1). 198
2). 180
3). 108
4). 189
1. Find the value of : $(0.98)^{3}+ (0.02)^{3}+3\times 0.98\times 0.02-1$
2. The value of $\left[\frac{(0.337 + 0.126)^{2} -(0.337-0.126)^{2}}{0.337 \times 0.126}\right]$ is :
8. The value of $(3+2\sqrt{2})^{-3}+ (3-2\sqrt{2})^{-3}$ is :
9. By how much does $5\sqrt{7}-2\sqrt{5}$ exceed $3\sqrt{7}-4\sqrt{5}$
10. By how much does $\sqrt{12}+2\sqrt{18}$ exceed $2\sqrt{3}+2\sqrt{2}$