Question

Please help with the attatched!

Answer 1

`a = -9 - 11√(5) - √(5)b`

a = 51

b= -11

Answer 2

Answer: a + b = 40

`(3+√(5))(7-6√(5))=3.7+7√(5)-3.6√(5)-6√(5).√(5)\\\\=21+6.5-11√(5)\\\\=51-11√(5)`

because
`(3+√(5))(7-6√(5))=a+b√(5)`

=> a = 51

b = -11

=> a + b = 51 -11 =40

Explanation: