Answer:
x= 3 and x= -3
Step-by-step explanation:
x^2 -9 = 0
Factor x^2-9
(x+3)(x-3)
If x+3=0, then x= -3
If x-3=0, then x= 3
an = 10 – 4(n – 1)
Step-by-step explaination
answer is an = 10 – 4(n – 1)
