Question

Factorise :
1. x2 - 16
2. 25t2 - 9
5. 27x3 - 3x
6. m6 - 9t2
t2 y2
9.
10+ (x + 2y)2 – (x - 2y)2
9 16
12. 4x2 - 4y2 + 1622 - 16xz​

Answer 1

Answer:

use identity a^ - b^2 = (a +b)(a-b)

x^2 - 16 = x^2 - (4)^2 = (x+4)(x-4)

27x^3 - 3x = 3x(9x^2 - 1) = 3x(3x +1)((3x- 1)