36/4a-a^2 - 9/a при а = 14

Question

36/4a-a^2 - 9/a при а = 14

Answer 1

36/4*14-14^2-9*14=-126.25

Comments

36/a(4-a)-9/a=(36-36+9a)/a(4-a)=9a/a(4-a)=9/(4-a)