Question

x+y =5 and x²+y² = 111 then find x³+y³

Answer 1

here your ans hope this helpful for you

Answer 2

Answer:

Step-by-step explanation:

x+y=5

&x²+y²=111

There's formulae for x²+y²=(x+y)²-2xy

So, x²+y²= 5²-2×xy

111=25-2xy

86=-2xy

-xy= 86/2=-43

Now a/q, x³+y³= (x+y)(x²+y²-xy)

=(5)(111-43)

=5×68

=340

Hope,it helps you.