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