Question

what should be added to -4x²+3x+1 to get 2x²-9x+1​

Answer 1

Step-by-step explanation:

let the number be y

(-4x²-3x+1)+y=2x²-9x+1

y=2x²+4x²-9x-3x+1-1

y=6x²-12x

from this equitation we get two values of y

y=0

y=2