(3×2√5-3×3√2)(2+5√5)
=(6√5-9√2)(2+5√5)
=12√5+30√5√5-18√2-45√10
=12√5+150-18√2-45√10
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(3×2√5-3×3√2)(2+5√5)
=(6√5-9√2)(2+5√5)
=12√5+30√5√5-18√2-45√10
=12√5+150-18√2-45√10