Question

factorise a2b2+8ab-9​

Answer 1

Answer:

(ab + 9) • (ab - 1)

Step-by-step explanation:

Step  1  :

Trying to factor a multi variable polynomial :

1.1    Factoring    a2b2 + 8ab - 9  

Try to factor this multi-variable trinomial using trial and error  

Found a factorization  :  (ab + 9)•(ab - 1)

Final result :

 (ab + 9) • (ab - 1)

Answer 2

hi mate,

solution: a²b² + 8ab - 9

= ( ab )² + 2×ab×4 + 16 -25

= ( ab )² + 2×ab×4 + 4² - 5²

= ( ab + 4 )² - 5²

= ( ab + 4 + 5 )( ab + 4 - 5 )

= ( ab + 9 )( ab - 1 )

i hope it helps you.