Question 308784
Use the zero product property:
If {{{a*b=0}}}, then solve for {{{a=0}}} and {{{b=0}}}. 
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{{{(n+2)(2n+5)=0}}}
{{{n+2=0}}}
{{{highlight(n=-2)}}}
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{{{2n+5=0}}}
{{{2n=-5}}}
{{{highlight(n=-5/2)}}}