Expresión 18: StartFraction, left parenthesis, "x" minus 0 , right parenthesis squared Over 1.7 squared , EndFraction minus left parenthesis, "y" plus 1.4 , right parenthesis squared equals 1 left brace, "x" less than 2 , right brace left brace, "x" greater than negative 2 , right bracex−021.72−y+1.42=1x<2x>−2
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Expresión 19: StartFraction, left parenthesis, "y" plus 1.4 , right parenthesis squared Over .3 squared , EndFraction minus StartFraction, left parenthesis, "x" minus 0 , right parenthesis squared Over 1.2 squared , EndFraction equals 1 left brace, "x" greater than negative 2 , right brace left brace, "x" less than 2 , right bracey+1.42.32−x−021.22=1x>−2x<2
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Expresión 20: left parenthesis, "x" minus 0 , right parenthesis squared plus left parenthesis, "y" plus 1.4 , right parenthesis squared less than .1x−02+y+1.42<.1