The area of a square is 4x^2 + 28x + 49. What expression represents the length of each side of the square? I need a step by step to help out.

Look at attachment. has all info needed. need

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

If chord ab is congruent to chord cd, then what must be true about ef and eg?