Question

suitable identities to find the following products (X + 9) (X + 11)​

Answer 1

Step-by-step explanation:

$(x + a) (x + b) = {x}^{2} + x(a + b) + ab$

x2 + (9 + 11)x + 9 ×11

x2 + 20x + 99

Answer 2

Answer:

x^2+11x+9x+99

x^2+20x+99