Question

hepl plzz quick explain plz
$if \: x = \sqrt{11} - \sqrt{7} \div \sqrt{11} - \\ \sqrt{7} \: and \: y = \sqrt{11 } - \sqrt{7} \\ \div \sqrt{11} - \sqrt{7 \:} find \: {x}^{2} + {y}^{2}$

Answer 1

X = ✓11-✓7/✓11-✓7
Y = ✓11-✓7/✓11-✓7
To find,
X²+Y²
(✓11-✓7/✓11-✓7)²+(✓11-✓7/✓11-✓7)²
= (✓4/✓4)²+(✓4/✓4)² = 4/4+4/4 = 8/4 = 2