Question

спростити вираз

5a(a-1)+(a+2)(a-2)+5a

Answer 1

5a(a-1)+(a+2)(a-2)+5a = 5a² - 5a + a² - 4 + 5a = 6a² - 4

Answer 2

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