What must 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 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 -1 to get -6?

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

What must be subtracted from -1 to get -19 ?

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

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

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 2x^(4 ) + 4x^(2) - 3x + 7 to get 3x^(3) - x^(2) + 2x + 1 ?