Answer:
both solutions are real numbers and also integers
the positive solution is a whole/counting/natural number
Step-by-step explanation:
r² - 4r = 5
subtract 5 from both sides
r² - 4r - 5 = 5 - 5
r² - 4r - 5 = 0
factor out
(r - 5) (r + 1) = 0
solutions are r = 5, r = -1
r = 5 is a whole/counting/natural number
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Answers & Comments
Answer:
both solutions are real numbers and also integers
the positive solution is a whole/counting/natural number
Step-by-step explanation:
r² - 4r = 5
subtract 5 from both sides
r² - 4r - 5 = 5 - 5
r² - 4r - 5 = 0
factor out
(r - 5) (r + 1) = 0
solutions are r = 5, r = -1
both solutions are real numbers and also integers
r = 5 is a whole/counting/natural number