Question

if x-y=2 and xy=15,find x2+y2 and x3+y3 its urjent

Answer 1

Answer:

(x-y)²=x²+y²-2xy

2²=x²+y²-2×15

4=x²+y²-30

x²+y²=34

Answer 2

Step-by-step explanation:

Here

x - y = 2

xy = 15

( x² + y²) = ( x - y)² +2xy

= -2² +2 × 15

=- 4 + 30

= 26 answer