Respuesta :

HunterX
8x^2=56
divide noth sides by 8
x^2=7
square root both sides
x=2.65 or -2.65
kate200468
[tex]8x^2=56\ /:8\\x^2=7\\x^2-7=0\\(x- \sqrt{7} )(x+ \sqrt{7} )=0\\x-\sqrt{7}=0\ \ \ \ \ or\ \ \ \ \ x+\sqrt{7}=0\\x=\sqrt{7}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=-\sqrt{7}\\ \\ x\approx2.65\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x-\approx2.65[/tex]

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