Question

(X/3+y/5)^3 -(x/3-y/5)^3

Answer 1

Answer:

=》[X/3 + Y/5]^3 - [X/3 - Y/5]^3

=》[X/3+Y/5+X/3-Y/3]^3 -3[X/3+Y/5][X/3-Y/5][X/3+Y/5+X/3+Y/5]

=》[2x/3]^3 - 3[X^2/9-Y^2/25][2x/3]

=》8x^3/27 - [x^2/3 - 2y^2/25]2x/3

=》8x^3/27-2x^3/9+6xy^2/75

Answer 2

=》[X/3 + Y/5]^3 - [X/3 - Y/5]^3

=》[X/3+Y/5+X/3-Y/3]^3 -3[X/3+Y/5][X/3-Y/5][X/3+Y/5+X/3+Y/5]

=》[2x/3]^3 - 3[X^2/9-Y^2/25][2x/3]

=》8x^3/27 - [x^2/3 - 2y^2/25]2x/3

=》8x^3/27-2x^3/9+6xy^2/75

=》6xy^2/75 ANS...

HOPE IT HELPS UH