Question

What should be added to 2a2 + b to get 4a2 +6b-6?​

Answer 1

Answer:

Let x should be subtracted,

a^3 - 4a^2 + 5a - 6 - x = a^2 - 2a + 1

=> a^3 - 4a^2 + 5a - 6 - a^2 + 2a - 1 = x

=> a^3 - 4a^2 - a^2 + 5a + 2a - 6 - 1 = x

=> a^3 - 5a^2 + 7a - 7 = x

Hence. a^3 - 5a^2 + 7a - 7 should be subtracted.