(18a^4+27a^3) : (9a^2)- 10a^3:(5a) при a=-4

Question

(18a^4+27a^3) : (9a^2)- 10a^3:(5a) при a=-4

Answer 1

=9а^3(2а+3)/9а^2 - 2а^2= а(2а+3)-2а^2=2а^2+3а-2а^2= 3×(-4)=-12

---