What is the check for x^2-5x+6=0 by completing the square
x2−5x+6=0x2−5x=−6x2−5x+(5/2)2=−6+(5/2)2x2−5x+25/4=−6+25/4(x−5/2)2=1/4x−2.5=±0.5x=2.5±0.5x=3orx=2
check by substitution
32−5×3+6=0 true
22−5×2+6=0 true