Question

Identify terms which Contain x square and give the coefficient of x square in each of the following (a) 3x-5x square y +y square ​

Answer 1

3x-5x square y+y square

(3x-5x)2=(3x)2-2×3x-5x-(5x)2

9x2+30x-25x

(y+y)2= (y)2+2Xyxy+(y)2

y2+2y2+y2