ruggero-nigro documents

2x − 3 = 9 (a + b) 2 = a 2 + 2ab + b 2 x + 5 = 6 (x − 1) 2 = x 2 + 2x + 1 2x = 12 + x
Documents 2x − 3 = 9 (a + b) 2 = a 2 + 2ab + b 2 x + 5 = 6 (x − 1) 2 = x 2 + 2x + 1 2x = 12 + x