Answer :

Method of cross multiplication:

For the system of equations:

a1x + b1y + c1 = 0
a2x + b2y + c2 = 0



Here,

a1 = (a - b) , b1 = (a+b) , c1 = 2b2 - 2a2

a2 = (a+b), b2 = (a+b), c2 = - 4ab

So,
















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