If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer

If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer

The following figure is as follows: the length of the original square is a, and according to the meaning of (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) - A2 = 875, and the following is (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) - A2 = 875, according to the meaning of (a + 5) (a + 5) (a + 5) (a + 5 + 5) - 2 = 875, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & & nbsp; & nbsp; & nbsp; & & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &A = 850 ／ 10, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; a = 85.85 × 85 = 7225 (M2). A: the original area of the test field was 7225 m2