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Solve by factorisation. 1) 4x2 - 4a2x + a4 - b4 = 0 2) 1/a+b+x = 1/a + 1/b + 1/x
1.
Here, constant term = a 4 – b 4 = (a 2 – b 2) (a 2 + b 2)

And, coefficient of middle term = – 4a 2 = – {2 (a 2 + b 2)  + 2 (a 2 – b 2)}

2.
 


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