Answer:
r² - 8r - 22 = 6
r² -8r - 22 + 22 = 6 + 22
r² - 8r = 28
r² - 8r + 16 = 28 + 16
r² - 8r + 16 = 44
(r - 4)² = 44
r - 4 = ± √44
r - 4 + 4 = 4 ± √44
r = 4 ± √44
ANSWER: r = 4 + 2 √11 OR r = 4 - 2√11
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Answer:
r² - 8r - 22 = 6
r² -8r - 22 + 22 = 6 + 22
r² - 8r = 28
r² - 8r + 16 = 28 + 16
r² - 8r + 16 = 44
(r - 4)² = 44
r - 4 = ± √44
r - 4 + 4 = 4 ± √44
r = 4 ± √44
ANSWER: r = 4 + 2 √11 OR r = 4 - 2√11