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Home / Aptitude Tests / Mathematics / If a = \(\frac{2x}{1...
If a = 2x1x and b = 1+x1x,...

If a = 2x1x and b = 1+x1x, then a2 - b2 in the simplest form is

A.

3x+1x1

B.

3x21(x1)2

C.

x3x21x

D.

3x21(x1)

Correct answer is A

a2 - b2 = (2x1x)2 - (1+x1x)2

= (2x1x+1+x1x)(2x1x1+x1X)

= (3x+11x)(x11x)

= 3x+1x1