Question

evaluate root 5 + root 2 by root 5 minus 2 root 10 is equal to 3.162​

Answer 1

Answer: 3.324/3=4.441

Step-by-step explanation:        

+ 2√5√ − 2√=5√ + 2√5√ − 2√×5√ + 2√5√ + 2√=(5√ + 2√)(5√ + 2√)(5√ − 2√)(5√ + 2√)=(5√ + 2√)2(5√)2−(2√)2=(5√)2+(2√)2+2(5√)(2√)5 − 2=5 + 2 + 210√3=7 + 210√3=7 + 2 × 3.1623   [as, 10−−√ = 3.162]=7 + 6.3243=13.3243=4.441