Упростите (−4c−3)(2c+3)−(5c−9)(−9с−2)

Question

Упростите (−4c−3)(2c+3)−(5c−9)(−9с−2)

Answer 1

8с²-12с-6с-9-(-45с²-10с+81с+18)
8с²-12с-6с-9-(45с²+71с + 18)
8с²-12с-6с-9+45с²-71с-18
37с²-89с-27

Answer 2

(-4с-3)(2с+3)-(5с-9)(-9с-2)=
-8с²-12с-6с-9-(-45с²-10с-81с-18)=
-8с²-12с-6с-9+45с²+10с+81с+18=
45с²-8с²+81с+10с-12с-6с+18-9=
37с²+73с+9