x + 20/x = 9
x^2 - 9x + 20 = 0
I assume you can take it from here?
The sum of a number and 20 times its reciprocal is 9. Find the number(s).
Please show working
4 answers
is it x=-5 or -4 ??
no,
(x-5)(x-4) = 0
x = 4 or 5
negative numbers have negative reciprocals, so they'd add to -20
(x-5)(x-4) = 0
x = 4 or 5
negative numbers have negative reciprocals, so they'd add to -20
I mean add to -9
2 answers