Q62
The value of (1.25)3 - 2.25 (1.25)2 + 3.75 (0.75)2 - (0.75)3 is :
A.
1
B.
C.
D.
Answer
Answer: Option D
Solution
Answer: Option D
Solution:
Given expression :(1.25)3 - (0.75)3 - 3 × (1.25)2 × 0.75 + 3 × 1.25 × (0.75)2
= (1.25 - 0.75)3
= (0.5)3
=
=
[∵ (a - b)3 = a3 - b3 - 3a2 b + 3ab2]