Question

factorise x² - x -72

Answer 1

Answer:

=> x2-x-72

=> x2-9x+8x-72

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

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

=> x+8=0 x-9=0

x=9 ans.

=> x=-8 it is not possible.

Step-by-step explanation:

i hope it will be helpful for u!!!

Answer 2

Answer:

x²-(9-8)x-72

x²-9x+8x-72

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

(x-9)(x+8)