Квадрат суммы и квадрат разности
( a + b) = a + 2ab + b ( a + b) = a + 2ab + b ( a - b) = a - 2ab + b ( a - b) = a - 2ab + b (a+3) = (x+7) = (3x-4) = (9-5a) a +2٠a٠ x +14x+49 =a +6a (3x) -2٠3x٠ =9x -24x =81-90a+25a
a + 2ab + b =(a + b) a + 2ab + b =(a + b) a - 2ab + b =(a - b) a - 2ab + b =(a - b) 16x – 8xy + y a a m - 6mn + 9n 24ab +9a +16b =(4x – y) =(a + 6) 2 =(m - 3n) 22 2 =(3a + 4b)