Find the integer value of x in √(419 + x) to get the greatest integer nearest to √419?

Answer:
c: 22
Step-by-step explanation:
√419 is between 20 and 21
20² = 400
21² = 441
√419 is closer to 20 than 21 but we cannot have a negative x so we must find x for 21
√(419+22) = 21
x is 22