Question

evaluate using the identity (a-b)²=a²-b² to find the prod
uct (49)²

Answer 1

$(49)^{2} \\ = ( 50 - 1) ^{2} \\ = (50) ^{2} + (1)^{2} - 2(50)(1) \\ = 2500 + 1 - 100 \\ = 2401$