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OpenStudy (anonymous):
x^2-2=
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jhonyy9 (jhonyy9):
x2 -2=0 x2=2 x_1,_2=+/- sqrt2
OpenStudy (anonymous):
\[x^2 - 2 = (x+\sqrt2)(x-\sqrt2)\]
OpenStudy (anonymous):
x is 4, but i don't know what ^ means.
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