Question

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

Answer 1

Answer:

answer is 4x^2-3x-2

Step-by-step explanation:

let the added number be y

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

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

y=4x^2-3x-2

hope it helps you 1