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OpenStudy (anonymous):
Solve r^2-8r+16=0
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OpenStudy (anonymous):
r^2 - 8r + 16 = 0 r^2 - 4r - 4r + 16 = 0 r(r-4) - 4(r-4) = 0 (r-4)(r-4) = 0 r-4 = 0 r= 4
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