Question

If x=1/7+4√3 and y =1/7-4√3
find the value of
(a)x² + y²​

Answer 1

Answer:

(a) x² + y²

=> [(1/7) + (4√3)]² + [(1/7) - (4√3)]²

=> [(1/49) + (2)(1/7)(4√3) + 16*3] +[(1/49) - (2)(1/7)(4√3) + 16*3

=> (1/49) + (2/7)(4√3) + 48 + (1/49) - (2/7)(4√3) + 48

=>(1/49) + 48 + (1/49) + 48

=> 2/49 + 96

=>96.0408163