completing the square problem : 5x2 + 20 x + 32 = 0
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Multiply both sides by 5 ...we get
25x^2+100x+160=0
(5x)^2+2*5x*10+(10)^2-(10)^2+ 160=0
(5x+10)^2=100-160
(5x+10)^2=-60
(5x+10)=7.74
x=7.74-10/5
x=-0.452
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