Question

Выполните умножение 1) (a+b)(a+2) 2) (y+2)(y-3) 3) (a+1)(a-3)

Answer 1

1)a'2+2a×ba+2b
2)y'2-3y×2y-6
3)a'2-3a×a-3


'-это степень

Answer 2

1)  a^2 +2a +ab +2b
2)  y^2 -3y +2y -6 = y^2 -y-6
3) -3a +a^2+a -3 = a^2 -2a -3

Answer 3

1) (a+b)(a+2) = a(a+2) + b(a+2) = a^2 + 2a + ab + 2b

2) (y+2)(y-3) = y(y-3) + 2(y-3) = y^2 - 3y + 2y - 6 = y^2 - y - 6

3) (a+1)(a-3) = a(a-3) + 1(a-3) = a^2 - 3a + a - 3 = a^2 - 2a - 3