Answer:
Step-by-step explanation:
50t/(t^2+25)
4(t) = [50(t^2+25)-50t(2t)]/(t^2+25)^2 = (-50t^2+1250)/(t^2+25)^2
= -50(t^2-25)/(t^2+25)^2
Roots of 4(t) are 5 and -5
