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Giải PT:2x+2y+3+4x+2y+6−2x2+x+y−2=0" role="presentation" style="font-size: 13.696px; display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;"> hệ PT:2x+2y+3−−−−−−−−−−√+4x+2y+6−−−−−−−−−−√−2x2+x+y−2=0 và x2 +y2 +x-3y=2
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