Question

Without actually calculating find the value of (-5/8)³+ (3/8)³+ (1/4)³

Answer 1

Answer:

answer is -45/256

here the solution for your Q

Step-by-step explanation:

a3 + b3 + c3 = (a+b+c)(a2+b2+c2-ab-bc-ca)+3abc

where ,a+b+c=0

-5/8 + 3/8 + 1/4=0

then the whole term is zero

3abc=3×-5/8×3/8×1/4

= -45/256