Question

6. (a) If a^3+ b^3 = 9 and a +b = 3, find ab.​

Answer 1

Step-by-step explanation:

Given that :

a^3+b^3=9 and a+b=3

We know that

(a+b) ^3 =a^3+b^3+2ab

Subsitute the given equations in the above following

(3)^3=9+2ab

27=9+2ab

2ab=18

ab=9

Mark this answer as brainliest....

Answer 2

(a+b)^3 = a^3 + b^3 + 3ab(a+b)

(3)^3 = 9+ 3ab ( 3)

9+3ab (3) = 27

3ab (3) = 27 - 9

3ab = 18/3

3ab = 6

ab = 2

this is the correct answer