Answer:
20
Step-by-step explanation
Given the coordinate points (-3, 3) and (-1, -1)
The formula for calculating the distance between two points is expressed as;
![\sqrt[\square]{(x_2-x_1)^2+(y_2-y_{1_{}})^2}](https://img.qammunity.org/2023/formulas/mathematics/college/xptzi11tyjncxmqoifdywbv76znmc5t9et.png)
From the coordinates, x1 = -3, y1 = 3, x2 = -1 and y2 = -1
Substitute into the formula
![\begin{gathered} \sqrt[\square]{(-1-(-3))^2+(-1-3)^2} \\ =\text{ }\sqrt[\square]{(-1+3)^2+(-4)^2} \\ =\sqrt[\square]{(2^2)+16} \\ =\text{ }\sqrt[\square]{4+16} \\ =\text{ }\sqrt[\square]{20} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/zdyqplztzho5587bbf68v831flk2qsyuhv.png)
Hence the number that goes beneath the radical symbol is 20