Question

(a/2b + 2b/a)2 - (a/2b - 2b/a)2 - 4

Answer 1

Answer:

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Step-by-step explanation:

(

2b

a

+

a

2b

)

2

−(

2b

a

−

a

2b

)

2

−4

=(

2b

a

+

a

2b

+

2b

a

−

a

2b

)(

2b

a

+

a

2b

−

2b

a

+

a

2b

)−4

=(

2b

2a

)(

a

4b

)−4

=4−4

=0

Answer 2

Answer:

0

Step-by-step explanation:

$(\frac{a}{2b}+\frac{2b}{a})^2-(\frac{a}{2b}-\frac{2b}{a})-4\\\\=4(\frac{a}{2b})(\frac{2b}{a})-4........[\because (a+b)^2-(a-b)^2=4ab]\\\\=4(1)-4=0$

Hope it helps!

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