Question

(vii) (0.2)3 + (0.3)3 - (0.5)3 by using suitable identity please answer with step by step solution​

Answer 1

Answer:

-0.09

Step-by-step explanation:

Giver (0.2)^3 + (0.3)^3 - (0.5)^3

we shall use the identity

a3 + b3 + c3-3abc= (a +b+c) ca^2+b^2+c^2-ab-bc-ca)

Lets take a 0.2 b=0.3. C=0.5

(a3 + b3 + c3)= (0.2+ 0.3-0.5) (a^2+b^2+c^2-ab-bc-ca)+3abc

a3+b3+c3=3abc

(0.2)^3+(0.3)^3-(0.5)^3=3*0.2*0.3*-0.5

=-0.09

hence the value is -0.09