$y=-4-3\sqrt3$ and $y=-4+3\sqrt3$
Work Step by Step
$(y+4)^2 = 27 \\ y+4 = ±3\sqrt3 \\$ $y+4=-3\sqrt3 \rightarrow y=-4-3\sqrt3$ $y+4=3\sqrt3 \rightarrow y=-4+3\sqrt3$
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