Question

If a - b = 5 and ab = 6 then value of a cube minus b cube equals to​

Answer 1

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Answer 2

Answer:

a-b=5

ab=6

By substitution method

a=6/b

a-b=5

6/b-b/1=5

6-2b=5

-2b=5-6

-b=-1/2

b=1/2

ab=6

a×1/2 =6

a=6×2

a=12

a^3-b^3= 12^3 - 1/2

1728-1/8= 13284 ÷8 -1

=1727