Question

without finding squares of the number evate (86)2 - (85)2​

Answer 1

7400-7225

=181 it may help you

Answer 2

Answer:

here we can use the proprty

$a ^{2} - b ^{2} = (a + b)(a - b)$

now,

$86 ^{2} - 85 ^{2} = (86 - 85)(86 + 85)$

$= 1 \times 171 \\ = 171$