Question

Without actual squaring find the value of a 685 square minus 684 squire

Answer 1

Step-by-step explanation:

(685)^2-(684)^2

=(685+684)(685-684)

=1369×1

=1369

Answer 2

Answer:

(685)^2 - (684)^2

(685+684)(685-684)[ by the identity a^2-b^2]

(1369)(1)

1369 is your answer