Question

what should what should be added to 1 + 2x – 3x2 to get x2–x–1​

Answer 1

Another number is = x^2-x-1 -(1+2x-3x^2)

= x^2-x-1-1-2x+3x^2

= x^2+3x^2-x-2x-1-1

= 4x^2-3x-2

So, the another number is 4x^2-3x-2

Hope you like and mark it as a brainliest solution..