Question

Please for tomorrow.

(5p+3r)^3-2r^3

Answer 1

(5p)^3 + (3r)^3 + 3(5p)^2(3r) + 3(5p)(3r)^2 - 2r^3

= 125p^3 + 27r^3 + 3(25p^2)(3r) +3(5p)(9r^2) -2r^3

= 125p^3 + 27r^3 + 225p^2r + 135pr^2 - 2r^3

= 125p^3 + 25r^3 + 225p^2r + 135pr^2