= (√10 + 3√2)(√10 + 3√2)
= (√10)² + 3√10√2 + 3√2√10 + (3√2)²
= 10 + 6√20 + 6 + 9(2)
= 10 + 6√20 + 6 + 18
= 34 + 6√20

= (3√(2²)(2) - 2³√2)(3√(2²)(2) + 2³√2)
= (3(2)√2 - 2³√2)(3(2)√2 + 2³√2)
= (6√2 - 2³√2)(6√2 + 2³√2)
= (6-2)² (2²+2) = 16.