Question

The sum of two cubes numbers is 9 and the product
is 20 find the Sum of their
cube and squares​

Answer 1

Answer:

Let the numbers be a and b

a+b=9

ab=20

Squaring on both sides

(a+b)^2=9^2

a^2+b^2+2ab=81

a^2+b^2+40=81

So sum of sqares is 81-40=41

Cubing on both sides gives

(a+b)^3=9

a^3+b^3+3ab(a+b)=729

a^3+b^3+60(9)=729

a^3+b^3=729-540=189

So the sum of cubes is 189.

Answer 2

Answer:

It is 189

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