Factors of 4: 2 and 2
y= (x+2)²
+√y or -√y = x+2
x= 2+√y , 2-√y
interchange variables
y= 2+√x , 2-√x
f ⁻¹(x) = 2 + √x, 2 - √x
I think it is 1/2
hope this helped
Answer:

Step-by-step explanation:
We have been given the zeroes of polynomial which are -1,2,7
That means the factors are (x+1) (x-2) (x-7)
When we want to a polynomial from zeroes we multiply the factors





Hence, the required polynomial is:

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