solve for x and y: (a-b)x +(a+b)y= a²-b²-2ab, (a+b)(x+y)= a²+b²
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Sol; Given that (a-b) x + (a + b)y = a2 - 2ab - b2 -------------(1) (a+b) x+ (a+b)y = a2 + b2 ------------------(2) Substracting (2) from (1) we get -2bx = -2ab - -2b2 x = a + bSubsitute x in equation (2) we get y = - 2ab / ( a + b).
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