Question

6 Simplifique as expressões abaixo. a) a(5a - 1) + (a + 2)² b) (2x + 3)² - x(x-4) c) (y - 3)(y + 2) - (y + 1)² d) (9y+ 1)²-(y + 9)² e) (2a + 3b)² - 4a(a + 3b) f) (1 + 5a)² + 25(1-a²)​

Answer 1

$57)y)85(61$