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OpenStudy (anonymous):
x^4-121=0
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OpenStudy (amorfide):
you can factorise this difference of two squares (x²+11)(x²-11)
OpenStudy (anonymous):
Notice how we have\[(x^2)^2-(11)^2=0\]It's a difference of squares... whic gives us:\[(x^2-11)(x^2+11)=0\]
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