Digital SAT Math Practice Question #2305
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Desmos Hack: Graph the left and right sides of any equation to instantly view intersection points and filter out extraneous solutions.
Square both sides: $x + 2 = x^2 \implies x^2 - x - 2 = 0 \implies (x - 2)(x + 1) = 0$. For $x = -1$, $\sqrt{1} = -1$ (false), so $x = -1$ is the extraneous root....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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