jessicafire921
jessicafire921
25-04-2017
Mathematics
contestada
x^2+2x=35
completing the square
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j4cek
j4cek
28-04-2017
[tex]x^2+2x=35[/tex]
[tex]x^2+2x+1=35+1[/tex]
[tex](x+1)^2=36[/tex]
[tex](x+1)^2=6^2[/tex]
[tex]x+1=6\lor x+1=-6[/tex]
[tex]x=6-1\lor x=-6-1[/tex]
[tex]\boxed{x=5\lor x=-7}[/tex]
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