Question

(0.4k^3 – 2.5k) – (2.4k^3 + 3k^2 – 1.2k)=

Answer 1

(0.4k^3 – 2.5k) – (2.4k^3 + 3k^2 – 1.2k)
= 0.4k^3 – 2.5k – 2.4k^3 – 3k^2 + 1.2k
= – 2k^3 – 3k^2 – 1.3k

Answer 2

Answer: – 2k^3 – 3k^2 – 1.3k

Step-by-step explanation: To solve the given problem we need to group the similar terms and add them (or substract them) as follows:

`(0.4k^(3)-2.5k)-(2.4k^(3)+3k^(2)-1.2k)=`

removing the parentheses and grouping the similar terms we have:

`(0.4-2.4)k^(3)-3k^(2) +(-2.5+1.2)k=`

calculating:

`-2k^(3)-3k^(2) -1.3k`