simplify 4√81 - 3√6 +√225 - 5√32
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Step-by-step explanation:
=4√81 - 3√6 +√225 - 5√32
=(4×9) - 3√6 +15 - (5×4)√2
=36 -3√6 +15-20√2
=21-3√6-20√2
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