Simplify the following.
Given, 4√72 – √50 – 7√128
Need to simplify it
⇒ the given expression is written as follows
⇒ 4
– 
– 7
= 24√2 –5√2 –56√2
= (24–5–56)√2
= –37√2
Hence, 4
– 
– 7
is simplified into –37√2
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