Question

if if x+y=5 x²+y²=13 find x³+y³​

Answer 1

Step-by-step explanation:

➡x+y=5

➡(x+y)²=25

➡x²+y²+2xy=25

➡13+2xy=25

➡2xy=12

➡xy=6

Now

x³+y³

=(x+y)(x²+y²-xy)

=5(13-6)

=5.7

=35