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If 50−2x=1850 - 2\sqrt{x} = 1850−2x=18, thevalue of xxx is
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Solving 50−2x=1850-2\sqrt{x}=1850−2x=18, weget −2x=18−50-2\sqrt{x}=18-50−2x=18−50 or −2x=−32-2\sqrt{x}=-32−2x=−32 or x=16\sqrt{x}=16x=16, and so x=162=256x=16^2=256x=162=256.
Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.