Question

If a/b+b/a = -1, then a³-b³=?​

Answer 1

Let a=4 ,b = 7. then a+b= 4+7= 11. & ab= 4×7=28. a³+b³= (a+b)(a²-ab+b²). 43+73 = (4+7) (42 -28 +72). = 11× (16 -28 +49).

Answer 2

Answer:

0

Step-by-step explanation:

a/b+b/a = -1

=> (a²+b²)/ab= -1

=> a²+ b² + ab= 0

a³ - b³ = (a-b) (a²+b²+ab)

= (a-b) x 0

= 0

Hope this help you