Question

Help me i really need this .no spam​

Answer 1

Question : 8

$11 \sqrt{5} + 4 \sqrt{7}$

Question : 9

• $x = - 1$
• $y = - 3$

Question : 11

• LHS isn't equal to RHS

Question : 12

• $x = \dfrac{ \sqrt{3} }{2 \sqrt{2} }$

Solution is in attachment ~