3. Find k so that x + 4 is a factor of x2 - kx + 8
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3. Find k so that x + 4 is a factor of x2 - kx + 8
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✏️FACTOR THEOREM
In factor theorem, (x - r) is a factor of polynomial P(x) if and only if P(r) = 0. Let (x + 4) equal to zero then substitute it to the function.
» Since (x + 4) is a factor of P(x), then P(-4) is equal to zero.
The value of that will make (x + 4) a factor to the polynomial is -6.
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