12 2 +16 2 = D2
D2= 144+256
D2= 400
D2= 400
Answer:
You put 8i^2 instead of 12i^2. You multiply -6i by -2i which equal -12i^2
Step-by-step explanation:
-7 + 6i - 14i+ 12i^2
-7 - 8i - 12
-19 - 8i
X = 90 degrees
angle B = 47 degrees
add them together = 137
subtract from 180 = 43
y = 43 degrees
A and D... i think but i would rather go with A and C
