Question

Please solve this question




please give step by step answer!!!!!!!!​

Answer 1

Step-by-step explanation:

From (a+b)^2 = a^2 + b^2 +2ab. We get ■ is 0, ∆ is 1 and ● is 2.

So, ■ + ∆ + ● = 1 + 2 + 0 = 3