Question

pls factorise it ASAP​

Answer 1

Answer:

a=1/b

b=1/a

ab=1,-9

Step-by-step explanation:

${a}^{2} {b}^{2} + 8ab - 9$

${a}^{2} {b}^{2} + 9ab - ab - 9$

ab(ab+9)-1(ab+9)=0

(ab-1)(ab+9)=0

ab=1 , -9

a = 1/b

Answer 2

Answer:

   $a^{2} b^{2}$+8ab-9

=  $a^{2} b^{2}$+9ab-ab-9

= ab(ab+9)-1(ab+9)

= (ab-1)(ab+9)