5√2 + √32 - √18
= 5√2 + √(16.2) - √(9.2)
= 5√2 + 4√2 - 3√2
= (5+4-3)√2
= 6√2
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5√2 + √32 - √18
= 5√2 + √(16.2) - √(9.2)
= 5√2 + 4√2 - 3√2
= (5+4-3)√2
= 6√2