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OpenStudy (anonymous):
Give the equation y = x^2 - 4, what are the solutions to x^2 - 4 = 0 ?
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OpenStudy (anonymous):
\[(x+2)(x-2)=0\]
OpenStudy (anonymous):
difference of two squares
OpenStudy (anonymous):
How would you explain that is correct?
OpenStudy (anonymous):
\[a^2-b^2=(a-b)(a+b)\] so\[x=2,x=-2\]
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