PDF chapter test TRY NOW

Find the GCD of the following:
 
S.NoExpressionGCD
(i)\((y^3 + 1)\) and \((y^2 - 1)\)i+i
(ii)\(2x^2 - 18\) and \(x^2 - 2x - 3\) ii
(iii)\((a - b)^2\), \((b - c)^3\), \((c - a)^4\)