What number must be added to the expression below to complete the square? x2-5x

Hi my sisters and brothers can tell me the answer because i don’t understand the question

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t