Question

if a+b=8 then a cube + b cube=?​

Answer 1

Answer:

-224 is the correct answer

Answer 2

Answer:

then b = 6. ∴if a = -6,. then a³ - b³ = - 216 + 8 = -208. if a = -2. then a³ - b³ = -8 + 216 = 208. 

Step-by-step explanation:

a3 - b3 = (a – b)3 + 3ab (a- b) = ( -8 )3 + 3 (-12) (-8) = -512 + 288 = -224