x-a2
xb2
xa2 - b2
1xa2+b2
xb2 - a2
Correct answer is D
(xaxb)a + b = (xa2+abxb2+ab)
= xa2 - b2
{xa+bxa−b} = xa + b - a + b
= x2b
= x2a
= xa2 - b2
= xb2 ÷ a2 = 1xa2+b2
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