document.write( "Question 455929: If the distance between the point (a,3) and (2,- 4) is sqr rt 74 units.Find a. How can I find a if they gave me any numbers in order to find a? Please show me how to solve this problem \n" ); document.write( "
Algebra.Com's Answer #312987 by lwsshak3(11628)\"\" \"About 
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If the distance between the point (a,3) and (2,- 4) is sqr rt 74 units.Find a. How can I find a if they gave me any numbers in order to find a? Please show me how to solve this problem
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\n" ); document.write( "\n" ); document.write( "To solve this problem use the distance formlula:
\n" ); document.write( "d=sqrt(x1-x2)^2+(y1-y2)^2)
\n" ); document.write( "√74=sqrt(2-a)^2+(-4-3)^2
\n" ); document.write( "square both sides
\n" ); document.write( "74=4-4a+a^2+49
\n" ); document.write( "74=a^2-4a+53
\n" ); document.write( "a^2-4a-21=0
\n" ); document.write( "(a-7)(a+3)=0
\n" ); document.write( "a=7
\n" ); document.write( "or
\n" ); document.write( "a=-3
\n" ); document.write( "
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