L=2w-6
area = L x W
108=(2w-6)w
108 = 2w^2-6w
2w^2-6w-108 = 0
2(w^2-3w-54)=0
2(w-9)(w+6) = 0
w=9
L= 2(9)-6 = 12
12*9 = 108
Answer:
40
Step-by-step explanation:
j+8k
first -2i+j+4k-3i-2j+7k+5i+2j-3k
Discriminant : k² - 4(12)(27) < 0
So k² - 1296 < 0, -36 < k < 36.
1,-4
I hope it helps because we did that in class
