Answer:
B
Step-by-step explanation:
I don't know how to explain it, but I hope I got it right and that it helped you.
The only way to solve if it is equal to something
assuming that the teacher wanted you to make it equal to zero do
0=-3x^2-21x-54
remember if we can do
xy=0 then assume x and y=0
so factor
0=-3x^2-21x-54
undistribute the -3
0=-3(x^2+7x+18)
remember 0 times anything=0 so
x^2+7x+18 must equal zero
use quadratice formula which is
if you have
ax^2+bx+c=0 then
x=
x^2+7x+18
a=1
b=7
c=18
x=
x=
x=
i=√-1
x=
the zerose would be
x=
or
1. Supplementary
2. Complementary
3. Adjacent angles
4. Vertically opposite angles
Hope it helps. Please mark brainliest.
Answer:
131
Step-by-step explanation:
khan academy