If x + y = 13, then (x - 8)3 + (y - 5)3 is:
Answer & explanation
Correct answer: option 2
If x + y = 13, then (x - 8)3 + (y - 5)3
Subtract 13 from both the sides,
x - 8 + y - 5 = 13 - 13
x - 8 + y - 5 = 0
now we can say x = 8 and y = 5
Put the values of x and y in the required equation,
(x - 8)3 + (y - 5)3 = (8 - 8)3 + (5 - 5)3
(x - 8)3 + (y - 5)3 = 0