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