Combine these radicals. 3 square root of 2 -5 square root of 2

You can see that both terms involve the square root of two. Think of it as a variable, say x. Your expression becomes

the answer is b

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20