Question

Find the value of 2.7^3-1.6^3-1.1^3 using a suitable identity.​

Answer 1

Answer:

14.256

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+3(2.7)(1.6)(1.1)

=(1.1)^3+14.256

2.7^3-1.6^3-1.1^3

=(1.1)^3+14.256-(1.1)^3

=14.256

Note:a^3-b^3-(a-b)^3=3abc

Answer 2

Answer:

2.7 –1.6 whole cube +3(2.7) (1.6) (2.7–1.6)

1.1 whole cube +3(2.7) (1.6) (1.1)

1.1 whole cube + 14.256

2.7 cube –14.256– (1.1) whole cube

14.256 Answer