1.

What should be added to 1+2+3x^2 to get x^2-x-1 ?​

Answer»

Answer:

4x^2-3x-2

Step-by-step explanation:

LET US ASSUME y should be added to 1+2x-3x^2

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

=>Y = x^2 - x - 1 - (1+2x-3x^2)

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

=>Y = 4x^2 - 3x -2

Hence 4x^2-3x-2 MUST be added


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