For what value of x is the expression x - 5 / x 2 -

MATHEMATICS

WAEC 1998

For what value of x is the expression

x - 5/x² - 2x - 3

not defined?

A. 3, 1
B. -1, -3
C. -1, 3
D. 3, -2

Correct Answer: C. -1, 3

Explanation

x² - 2x - 3 = 0

x² - 3x + x - 3 = 0

x(x - 3) + (x - 3) = 0

(x + 1)(x - 3) = 0

x = -1 or 3

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