Work Step by Step
$x^2+13x=-42$ $x^2+13x+42=-42+42$ $x^2+13x+42 = 0$ $(x+6)(x+7)=0$ $x+6=0$ $x+6-6=0-6$ $x=-6$ $x+7=0$ $x+7-7=0-7$ $x=-7$
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