4 root 256 +6 root 64+7root128-4root625
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(4√256)+(6√64)+(7√128)+(4√625)
=(4*16)+(6*8)+(7*8√2)+(4*25)
=64+48+56√2+100
=222+56√2.
=(4*16)+(6*8)+(7*8√2)+(4*25)
=64+48+56√2+100
=222+56√2.
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