Question

If2y+1/2y=I and2y-1/2y=m then l²-m²=?

Answer 1

Answer:

=4

Step-by-step explanation:

(2y+1/2y)^2 -(2y-1/2y)^2

(2y)^2+2×2y×1/2y+(1/2y)^2 -( (2y)^2-2×2y×1/2y+(1/2y)^2

4y^2+2+1/4y^2-(4y^2-2+1/4y^2

=4