Verified answer

Step-by-step explanation:

[tex]25 \div 7 + 32 \div 7 - 48 \div 7 [/tex]

Step-by-step explanation:

(y-2)^3 - 6(y-2)^2 + 12(y-2) -8

Let (y-2) = a

so, the given problem can be written as,

a^3 -6a^2+12a-8

= a^3-3.a^2.2 + 3.a.2^2 - 2^3

= (a-2)^3 [ as we know ( x-y)^3 = x^3 -3x^y × 3xy^2- 2^3]

now,

a-2 = y-2 -2 ( putting the value of a = y-2)

= y-4

= 2.2 - 4 ( given y=2.2)

= - 1.8

so, (a-2)^3

= (- 1.8)^3

= -5.832