Question

b) Factorise :
72 - X - X2​

Answer 1

Answer:

Your answer

Step-by-step explanation:

x2 – x – 72 = x2 – 9x + 8x – 72

= x(x - 9) + 8(x - 9)

= (x – 9) (x + 8)

Answer 2

Answer:

=>72 - X - X2= (8-X)(9+X)