Match each of the following with its correct simplified solution
1. ab(a + b)
2. (a + b)(2a + 2b)
3. (a + b)2
4. (a + b)(a - b)

a. a2 - b2
b. 2a2 + 4ab + 2b2
c. a2 + 2ab + b2
d. a2b + ab2

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The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

What are the domain and range of the function f(x)=2^x+1