Question

find the value of 2.7^3 - 1.6^3 - 1.1^3 by using suitable identity
its a question from polynomial chapter

Answer 1

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Here's your answer

We know that if,

a+b+c = 0

then

a³+b³+c³ = 3abc

In this case

a = 2.7

b = -1.6

c = -1.1

a+b+c

= 2.7 -1.6 - 1.1

= 0

Therefore,

2.7³ -1.6³ -1.1³

= 3 * 2.7 * -1.6 * -1.1

= 14.256

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Answer 2

Step-by-step explanation:

(2.7)³-(1.6)³

(2.7-1.6)³+3(2.7)(1.6)(2.7-1.6)

1.1^3+14.256

1.1³+14.256-1.1³

14.256