$(5.5)^3 - (4.5)^3$ is equal to : Options: A . &nbsp75.25 B . &nbsp1 C . &nbsp74.25 D . &nbsp75

$(5.5)^3 - (4.5)^3$ is equal to :

Question

$(5.5)^3 - (4.5)^3$ is equal to :

Options:

A . 75.25

B . 1

C . 74.25

D . 75

Answer: Option A
Answer: (a)$(5.5)^3 - (4.5)^3$= $(5.5 - 4.5)^3$ + 3 × 5.5 × 4.5 (5.5 - 4.5)= $(1)^3$ + 74.25(1)= 1 + 74.25 = 75.25

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