Question

Pls help help help help help​

Answer 1

Answer:

a+b=9

squaring both side

(a+b)²=9²=81

(a+b)²=a²+b²+2ab

81=a²+b²+2×18

a²+b²=45

(a-b)²=

a²+b²-2ab

45-2×18

45-36

=9=(a-b)²

$\sqrt{9} = 3 = a - b$

hence found

2) ×+1/×=4

squaring other sides

(×+1/x)²=4²=16