If x= 4+root 15 and y=4-root 15 then the value of x square+y square by x cube+y cube is ???
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1. Draw AB=7.9 units
2. Now extend AB till C such that BC = 1 unit.
3. Now mark centre of AC at F and taking AF as radius and F as centre draw a semi circle till C.
4. Now extend B to the semi circle such that it meets the circumference to D.
5. Hence BD.
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