What is the possible length of the unknown side of the triangle ?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

This is so hard and it’s for a test

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?