Question

any solve me this one pls help solve step by step​

Answer 1

Answer:

756

Step-by-step explanation:

a³+b³ =(a+b)³-3ab(a+b)

=(12)³-3×27×12

=1728-972

=756

Answer 2

Answer:

63

Step-by-step explanation:

a + b = 12 ab = 27

a cube + b cube = (a + b)( a square + b square - ab)

                           = (12) ( 81 + 9 - 27)

                           = 12*(90- 27)

                           = 12 ( 63)

                            = 756      

(a - b) square = ( a + b) square - 4ab

                       = 12 square - 4*27

                       = 144 -108

                        =  36

                a - b = 6

by solving a-b and a+b we get a = 9 and b =3