From Förberedande kurs i matematik 1

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-	{{NAVCONTENT_START}}	+	The left-hand side of the equation consists of two factors, ''x'' and ''x''&nbsp;+&nbsp;3. The only possibilities that their product is zero are if either ''x'' or ''x''&nbsp;+&nbsp;3 is zero. Hence, the equation has the solutions ''x''&nbsp;=&nbsp;0 and ''x''&nbsp;=&nbsp;-3.
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Current revision

The left-hand side of the equation consists of two factors, x and x + 3. The only possibilities that their product is zero are if either x or x + 3 is zero. Hence, the equation has the solutions x = 0 and x = -3.