(2-5i)(3+i)
use foil method to expand it into standard form
6+2i-15i+5i^2
5i^2-13i+6
If segment AB is perpendicular to segment CD, then a right angle (90°) is formed.
7x + 27 = 90
7x = 63
x = 9
Answer:

Step-by-step explanation:
Given:
.
we need to find the correct form for
if the equation is solve using undetermined coefficients.
A first order differential equation
is said to be homogeneous if
for all t.
Consider homogeneous equation 
Let
be the solution .
We get 
Since
,
.
So, we get solution as 
As constant term and
are already in the R.H.S of equation
, we can take
as 
The answer for the question is x=1
Answer:
117
Step-by-step explanation:
8×9=72
72+45=175
this is why the answer is 117