Question

simplify (4a -3)cube - (4a+3) cube

Answer 1

(4a-3)^3=(4a)^3-3(4a)^2b+3(4a)(3)^2-(3)^3

= 64a^3 - 48a^2b + 108a-27

(4a+3)^3=(4a)^3+3(4a)^2b+3(4a)(3)^2+(3)^3

= 64a^3 + 48a^2b + 108a+27

(4a-3)^3 + (4a+3)^3 = 128 a^3 + 216 a