x+y=a+b ax-by=a²-b² using cross multiplication method
maths question ​

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1. Answer:

   X+y=a-b,ax-by=a2+b2 by cross multiplication

   The above equation is generally written as : x/ b1 c2 – b2 c1 = y/ c1 a2 – c2 a1 = 1/a1 b2 – a2 b1.

   SOLUTION: x + y= a + b , ax – by= a² – b².

   The given system of equations may be written as: x + y-( a + b)= 0 , ax – by -( a² – b²)= 0. a1= 1, b1= 1, c1= -(a+b) a2= a , b2= -b , c2= -(a²-b²) x y 1.

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