Question

Squring value of 685 squire minus 684 square

Answer 1

We know a²-b² = (a+b)(a-b)

So, 685²-684²= (685+684)(685-684) = 1369*1 = 1369

Answer 2

AnswEr :

we know that ; ▣ (a² - b²) = (a + b)(a - b)

➟ (685)² - (684)²

➟ (685 + 684)(685 - 684)

➟ 1369 × 1

➟ 1369