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Mathematics

Grade10

Easy

Question

Determine the solutions of the quadratic equation $straight x squared plus straight x minus 2 equals 0$ by factoring.

_{$x = 1, x = - 2$}
_{$x = - 1, x = - 2$}
$x = - 1, x = 2$
$x = 1, x = 2$

The correct answer is: _{$straight x equals 1 comma space straight x equals negative 2$}

$straight x squared plus straight x minus 2 equals 0 straight x squared plus 2 straight x minus straight x minus 2 equals 0 straight x open parentheses straight x plus 2 close parentheses minus 1 open parentheses straight x plus 2 close parentheses equals 0 open parentheses straight x minus 1 close parentheses open parentheses straight x plus 2 close parentheses equals 0 straight x minus 1 equals 0 comma space straight x plus 2 equals 0 straight x equals 1 comma space straight x equals negative 2$

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