Question

(9x-5t)(9x+3t):expand it​

Answer 1

Answer:

9x(9x+3t)-5t(9x+3t)

9x^2+27xt-45tx-15t^2

9x^2-18xt-15t^2

Answer 2

Answer:

$\sf\fbox\red{αɳรωεɾ:-}$

Given: (9x5t) (9x + 3t) (9x - 5t) (9x + 3t)

= 9x * (9x + 3t) - 5t * (9x + 3t)

= 81x² + 27xt 2 45xt - 15t²

= 81x² 2 18xt 15t²

= 3

81x² - 18xt 15t² is the required answer.