Question : Simplify the given expression.
$(1 - 2x)^2 - (1 + 2x)^2$

Option 1: $8x$

Option 2: $-8x$

Option 3: $-(2 + 8x^2)$

Option 4: $2 + 8x^2$

Question : What the least value should be added to 2505 so that it becomes a perfect square?

Option 1: 5

Option 2: 20

Option 3: 70

Option 4: 96

Question : What smallest value must be added to 508, so that the resultant is a perfect square?

Option 1: 4

Option 2: 9

Option 3: 18

Option 4: 21

Question : What is the smallest value that must be added to 709, so that the resultant is a perfect square?

Option 1: 8

Option 2: 12

Option 3: 20

Option 4: 32

Question : One of the factors of the expression $4\sqrt{3}x^{2}+5x-2\sqrt{3}$ is:

Option 1: $4x+\sqrt{3}$

Option 2: $4x+3$

Option 3: $4x-3$

Option 4: $4x-\sqrt{3}$