Answer:
81
Step-by-step explanation:
(9x - 4)(9x + 4) = ax² - b
81x² - 36x + 36x - 16
= 81x² - 16
=> a = 81
If this is a true of false question then it is true.
Answer:
$7.8
Step-by-step explanation:
$2.6 x 3
= $7.8
Answer:`13H
Step-by-step explanation:
Answer:
2
Step-by-step explanation: