" What must be subtracted from "a^(3)-4a^(2)+5a-6" to obtain "a^(2)-2a+1?

What should be subtracted from a^3-4a^2+5a-6 to obtain a^2-2a+1?

What should be subtracted from a^3-4a^2+5a-6 to obtain a^2-2a+1?

What must be subtracted from -3 to get -9?

what must be subtracted from 3a^(2) - 6ab - 3b^(2) - 1 to get 4a^(2) - 7ab - 4b^(2) + 1 ?

What must be subtracted from x^(2)-2x^(3)+5x+7 to obtain 3x^(2)+8+2x^(3)-5x

What must be sutracted from (x ^(3) + 4x ^(2) - 6x - 14) to obtain a polynomial exactly divisible by (x ^(2) - x - 2) ?

What must be subtracted from -7 to obtain -15?

What must be subtracted from 3x^(3) - 5x^(2) - x+2 " to get " 4x^(3) + 3x - 5 ?

What must be subtracted from -1 to get -6?

What should be subtracted from -7x^(3)+2x^(2)+8 to obtain -4x^(2)+9x-6