(p/q-q/p)=21/10. Then find 4p/q+4q/p?	Choose the correct choice.
A) 58/9	B) 58/5	C) 58/7	D) 58/2	E) 58/1
Let p/q = a, then (a - 1/a) = 21/10   ⇒a2−1=a.2110⇒a2−1=a.2110   ⇒10a2−21a−10⇒10a2−21a−10 = 0   Roots of the equation = −b±b2−4ac−−−−−−−√2a−b±b2−4ac2a   a = 21±441+400−−−−−−−−√2021±441+40020   a = 21±292021±2920 = 5/2 or -2/5   For a = 5/2, 4p/q+4q/p = 58/5   For a = -2/5, 4p/q+4q/p = -58/5   Answer:58/5
<result>B</result>
(p/q-q/p)=21/10. Then find 4p/q+4q/p?