Question

please solve this...​

Answer 1

Step-by-step explanation:

a = 3 - b

a3 + b3 = (3-b)^3 + b3

9 = 27-b3-9b(3-b) + b3

9 = 27-27b+9b2

0 = 18 -27b+9b2

0 = b2-3b+2

0= b2-b-2b+2

0= (b-1) (b-2)

b= 1 or b= 2

a = 1 or a = 2

an = 2