Answer: You have to get rid of the variables (the x's) so subtract 2x from 2x and 11x then go from there.
Step-by-step explanation:
Answer:
(7b-8) (7b+8)
Step-by-step explanation:
49b^2 – 64
This is the difference of squares
(a^2 -c^2) = (a-c) (a+c)
a^2 = 49b^2 so a = 7b
c^2 = 64 so c = 8
(49b^2 -64) = (7b-8) (7b+8)
Answer: Right
Step-by-step explanation:
The complex conjugate of <span>7i</span><span> is </span><span>−7i </span>The complex conjugate of a number
z is a number with opposite imaginary part.
So if <span>z=a+bi</span> then conjugate is: <span><span>¯z</span>=a−bi</span> for any <span>a,b∈R</span>
We can note, that if we represent all complex numbers in coordinate system, then for any number: the number z and its conjugate <span>¯z</span> are symetrical according to "real part" axis.
Answer:
x=70
Step-by-step explanation:
45+2x-5=180
40+2x=180
2x=140
x=70