x + y = 3, x - y = 1 হলে, 4xy এর মান____
x + y = 3, x - y = 1 হলে, 4xy এর মান____ Correct Answer 8
4xy = (x + y)2 - (x - y)2 = (3)2 - (1)2 = 9 - 1 = 8x + y = 3, x - y = 1 হলে, 4xy এর মান____ Correct Answer 8
4xy = (x + y)2 - (x - y)2 = (3)2 - (1)2 = 9 - 1 = 8