Answer :
The value of f(-1) is -3 and the zeros or roots of f(x) are -2 and 2
How to interpret graph
Interpretation: f(-1) gives the function's value at x = -1
f(-1) corresponds to the y-value when x = -1. It indicates the height of the curve at that point.
From the graph
At x = -1, trace to coincide with the curve at y = -3
So, f(-1) = -3
The values of (x) for f(x) = 0 are where the curve crosses the x-axis. These are the points where the function equals zero.
The curve crosses x-axis at -2 and 2
The roots of the equation are -2 and 2
With the roots know
f(x) = (x+2)(x-2)
= x² -2x + 2x -4
= x² - 4
Difference of two squares.
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