Answer:
(x - 9)(x + 9)
Step-by-step explanation:
x² - 81 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b), then
x² - 81
= x² - 9²
= (x - 9)(x + 9)
6(7+5) + 3 =
42 + 30 + 3 = <<<< This one is the equivalent expression
If you wanted to continue and solve...
72 + 3 =
75
Answer:
A
Step-by-step explanation:
The picture is how you solve it