Simplyfy 4root81 - 3×3root243 +5×4root625
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Answer:
4√81 - 3×3√243 +5×4√625
=4*9 - 9*9√3 +20*25
=36 - 81√3 +500
=536 - 81*1.732 [√3=1.732]
=536 - 140.292
=395.7
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