Question

What should be added to 1+2x-3xsquare to get xsquare-x-1
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Answer 1

Answer:

4x² - 3x - 2 should be added

Step-by-step explanation:

Your Question must be

"What should be added to 1+2x-3x² to get x²-x-1

let p(x) = -3x² + 2x + 1

and g(x) = x² - x - 1

Let the number to be added be f(x)

so, According to the Question,

p(x) + f(x) = g(x)

then,

f(x) = g(x) - p(x)

f(x) = (x² - x - 1) - (-3x² + 2x + 1)

f(x) = x² - x - 1 + 3x⁴ - 2x - 1

f(x) = 4x² - 3x - 2

Hope it helped and you understood it........All the best