Question

x²-7x-18 factorise using suitable identity ​

Answer 1

Answer:

x= 9,-2

Step-by-step explanation:

Factorize x^2-7x-18

Multiply --- -18

Add --- -7

-9 * 2

Multiply -9*2 = -18

Add -9+2 = -7

So (x-9)(x+2)=0

x-9=0; x+2=0

x= 9; x= -2