One must use the division property
Answer:
36
Step-by-step explanation:
![\sqrt[4]{16 \times 27 \times 54 \times 72 \: \: } \: = 36](https://tex.z-dn.net/?f=%20%5Csqrt%5B4%5D%7B16%20%5Ctimes%2027%20%5Ctimes%2054%20%5Ctimes%2072%20%5C%3A%20%20%5C%3A%20%7D%20%20%5C%3A%20%20%3D%2036)
Subsitute -4y for x
-4y+6y=18
2y=18
divide both sides by 2
y=9
sub back
x=-4y
x=-4(9)
x=-36
(x,y)
(9,-36)
The answer is (m+5) (m+7).
The answer is 73,920 because if you multiply you are going to end up with that number.