(b) 1
Given exp. = \(\frac{17}{15}\times\)\(\frac{17}{15}+\)\(\frac{2}{15}\times\)\(\frac{2}{15}-\)2 x \(\frac{17}{15}\times\)\(\frac{2}{15}\)
= \(\big(\frac{17}{15}\big)^2\) + \(\big(\frac{2}{15}\big)^2\) - 2 x \(\frac{17}{15}\times\)\(\frac{2}{15}\)
= \(\big(\frac{17}{15}-\frac{2}{15}\big)^2\) [Using a2 + b2 - 2ab = (a - b)2]
= \(\big(\frac{15}{15}\big)^2\) = 12 = 1