(1) If the square of a negative number equals 289, find the number. (2) if the square of a number equals 36 / 25, find the number (3) The length of two right angles of a right triangle is 6cm and 48CM respectively calculation: (4) Radical (- 3 / 4) square (5) - radical (- x) square (6) - radical 10 * radical 15 (7) - 4 radical 45 * (- 2 radical 5) (8) 2 radical XY · 1 / 3 radical 1 / X Simplification: (9) Radical 4 and 4 / 9 (10) radical M & # 710; 4 n-2 M & # 710; 3 N & # 710; 2 + M & # 710; 2 N & # 710; 3 (M > n > 0)

(1) If the square of a negative number equals 289, find the number. (2) if the square of a number equals 36 / 25, find the number (3) The length of two right angles of a right triangle is 6cm and 48CM respectively calculation: (4) Radical (- 3 / 4) square (5) - radical (- x) square (6) - radical 10 * radical 15 (7) - 4 radical 45 * (- 2 radical 5) (8) 2 radical XY · 1 / 3 radical 1 / X Simplification: (9) Radical 4 and 4 / 9 (10) radical M & # 710; 4 n-2 M & # 710; 3 N & # 710; 2 + M & # 710; 2 N & # 710; 3 (M > n > 0)

(1) The square of a negative number is equal to 289, find this number. (- 17) &# 178; = 289 = - 17 (2) the square of a number is equal to 36 / 25, find this number. The steps are as follows: (6 / 5) &# 178; = 36 / 25 (- 6 / 5) &# 178; = 36 / 25, this number is 6 / 5 or - 6 / 5 (3) the lengths of two right angles of a right triangle are 3 radicals respectively