## To solve the equation "2 plus 2," you simply add the numbers together. In this case, 2 plus 2 equals 4.

To find the square root of 145, you can use a calculator or a mathematical function. Most calculators have a square root symbol (β) that you can use. Simply input the number 145 and press the square root button to get the answer. In this case, the square root of 145 is approximately 12.042.

To find the factors of a set of numbers (25, 28, 40, 42, and 48), you can follow these steps:

1. Start by writing down the numbers.

2. Look for the common factors between the numbers. For example, both 25 and 40 are divisible by 5, so 5 is a common factor.

3. Continue looking for common factors among the numbers.

4. Keep a record of the factors you find. For example, the common factors of 25, 28, 40, 42, and 48 are 1, 2, 4, 7, and 14.

Therefore, the factors of the given numbers are 1, 2, 4, 7, and 14.

Lastly, the answer to the equation "2 plus 2" is simply 4, as mentioned earlier.