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What is the check for x^2-5x+6=0 by completing the square

 Jun 26, 2015

Best Answer 

 #1
avatar+118696 
+5

 

x25x+6=0x25x=6x25x+(5/2)2=6+(5/2)2x25x+25/4=6+25/4(x5/2)2=1/4x2.5=±0.5x=2.5±0.5x=3orx=2

 

check by substitution

325×3+6=0   true

225×2+6=0   true                 

 Jun 27, 2015
 #1
avatar+118696 
+5
Best Answer

 

x25x+6=0x25x=6x25x+(5/2)2=6+(5/2)2x25x+25/4=6+25/4(x5/2)2=1/4x2.5=±0.5x=2.5±0.5x=3orx=2

 

check by substitution

325×3+6=0   true

225×2+6=0   true                 

Melody Jun 27, 2015

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