Find the value of the expression (36x2 + 25y2 – 60xy) when and

Given,


(36x2 + 25y2 – 60xy)


X =


Y =


With the help of the formula (a - b)2 we get;


= (6x)2 + (5y)2 – 2(6x)(5y)


= (6x – 5y)2


=


= (4 – 1)2


= (3)2 = 9


10