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All right.
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For this problem, we have x is equal to negative 3 being the solution to three of these four equations.
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Our goal is for choice a, b, c, or d.
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We need to pick the correct one that does not have a solution of x equals negative 3.
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There's a couple ways that you can go about doing this, but i would say the easiest way is simply taking x equals negative 3 and plugging it into each one either in your head or on paper.
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I'll show you a couple of examples in this video of what i mean.
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And just seeing which equation is false, the false equation will not have negative 3 as a solution.
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So let's go to choice a right now.
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Choice a says x squared minus 2x minus 15 is equal to 0.
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And our goal is to figure out if negative 3 is a solution to this equation.
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So we're going to plug it in for x in this equation.
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Use parentheses.
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Make sure you're careful with that.
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We will have negative 3 in parentheses squared minus 2 times negative 3 minus 15 is equal to 0.
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Simplify the left side making sure that you follow the order of operations...