Question

Factorise  i)x2-36  ii) z2-12z-45​

Answer 1

Answer:

1. (x-6) (x+6). 2.(x-15)(x+3)

Step-by-step explanation:

x^2 -(6)^2 apply the formula of difference between two perfect square

(x-6) (x+6)

2. apply factor or trinomial method

x^2 - (15-3)x -45

x^2 - 15x +3x -45

x(x-15) + 3(x-15)

(x-15) (x+3)