Answer:
21.142
Step-by-step explanation:
not sure it's correct
Difference-of-Squares Formula:
For a difference of squares a2 – b2, the factorization is:
(a – b)(a + b)
Answer:
36
Step-by-step explanation:
9 - 6x = 45
-9 -9
_____________
-6x = 54
x = -9
________________________
So when you plug that answer into x-4 you get -9 -4, which equals -13.