= √8(√2) + √8(√1.6) + √8(3√0.4) - 3√2(√2) - 3√2(√1.6) - 3√2(3√0.4) + √10(√2) + √10(√1.6) + √10(3√0.4)

= 2√2 + 2√1.6 + 6√0.4 - 3(2) - 3√3.2 - 9√0.4 + √20 + √16 + 3√4

= 2√2 + 2√1.6 + 6√0.4 - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 2√1.6 + 6√0.4 - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 2(√1.6) + 6(√0.4) - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 2(1.26) + 6(0.632) - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 2.52 + 3.792 - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 6.312 - 6 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 + 0.312 - 3.464 - 4.243 + 4.472 + 4 + 6

= 2√2 - 3.152 - 4.243 + 4.472 + 4 + 6

= 2√2 - 3.152 - 4.243 + 4.472 + 4 + 6

= 2√2 - 7.395 + 4.472 + 4 + 6

= 2√2 - 2.923 + 4 + 6

= 2√2 + 1.077 + 6

= 2√2 + 7.077

Therefore, (√8 - 3√2 + √10)(√2 + √1.6 + 3√0.4) simplifies to 2√2 + 7.077