Question

Solve the following:-
(xi) (3-2x)(3+ 2x)
(xii) (3x +4)(3x-5)
(xiii) (x + 2y + 4z)^2​

Answer 1

1. identity a²-b²= ( a+ b) (a-b)

then ,

3²-2x²= 9- 4x²