Question

what must be added to 2a^2 + 5a - a^2 - 6 to get a^2 - a - a^3 + 1

Answer 1

Answer:

5 - a^3 - 6a is to be added

Step-by-step explanation:

Let k is to be added.

2a^2 + 5a - a^2 - 6 + k = a^2 - a - a^3 +1

a^2 + 5a - 6 + k = a^2 - a - a^3 + 1

k = a^2 - a - a^3 - 1 - (a^2 + 5a - 6)

k = a^2 - a - a^3 - 1 - a^2 - 5a + 6

k = - a^3 - 6a + 5