(2√2-√32+√128)x√2
=2√2×√2-√32×√2+√128×√2
=2√4-√64+√256
=4-8+16
=12
√32-2(5√2-√18)
=4√2-10+6
=42-4
(1+√6)(2-√6)
=2+2√6-√6-6
=√6-6
(2√2-√32+√128)x√2
=2√2×√2-√32×√2+√128×√2
=2√4-√64+√256
=4-8+16
=12
√32-2(5√2-√18)
=4√2-10+6
=42-4
(1+√6)(2-√6)
=2+2√6-√6-6
=√6-6