Question

simplyfy:(2root+5root2)×(4root2_3root5​

Answer 1

Answer:

$( \sqrt{2} + 5 \sqrt{2} )(4 \sqrt{2} - 3 \sqrt{5} )$

$\sqrt{2} (4 \sqrt{2} - 3 \sqrt{5}) + 5 \sqrt{2} (4 \sqrt{2} - 3 \sqrt{5} )$

$(8 - 3 \sqrt{7} ) + (40 - 15 \sqrt{7} )$

$(8 - 3 \sqrt{7} + 40 - 15 \sqrt{7} )$

$= 48 - 18 \sqrt{7} is \: the \: answer$