7r2 - 7r= 0

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1 Answer

7r² - 7r = 0 (given)

7r (r - 1) = 0 (factoring, or what you call reverse distribution)

7r = 0 || r - 1 = 0 (divide both sides by r-1 and 7r to get these two equations)

r = 0 || r = 1 (solve for r)

The solution set is {0,1}.
by Level 1 User (300 points)

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