Question

2. Multiply:
(i) (x – 2y + 3) by (x + 2y)​

Answer 1

(x-2y+3)*(X+2y)

=(X)(x-2y+3)+2y(x-2y+3)

=x^2-2xy+3^x+2xy-4y^2+6yx

x^2-2xy+2xy+3^x-4y^2+6yx

x^2+3^x-4y^2+6yx