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Question

If (x2 + kx − 3) = (x − 3) (x + 1), then k = ?
(a) 2
(b) −2
(c) 3
(d) −1

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Solution

(b) −2

x-3x+1=x2-2x-3
Thus, we have:
x2+kx-3=x2-2x-3k=-2

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