спростити вираз 5a(a-1)+(a+2)(a-2)+5a

спростити вираз
5a(a-1)+(a+2)(a-2)+5a

  • 5a(a-1) + (a+2)(a-2)+5a=5a^2-5a + a^2 - 4 + 5a == 5a^2+a^2-4=6a^2-4

  • 5a(a-1)+(a+2)(a-2)+5a = 5a — 5a + a — 4 + 5a = 6a — 4