Please answer 3 ,4 please please I request you

Q   3 .       F i n d   t h e   v a l u e   o f   4 - 7   ×   2 - 5 Q   4 .       F i n d   t h e   v a l u e   o f   x - 4 x - 10 5 / 4

 
 

Kindly refer the same link for your query 3
https://www.meritnation.com/ask-answer/question/simplyfy-root4-7-root2-5/number-systems/10583953
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