<h3>Solution:</h3>
Using formula (a-b)^2 = a^2-2ab+b^2

<h3>Answer:</h3>
k = 9
Answer:
how do I not know it not a vires?
Step-by-step explanation:
Answer:
11 is the answer
Step-by-step explanation:
Answer: a-b+c+d =4
Step-by-step explanation:
The given system of equation is

from this we have the following matrices

the given matrix A =
On comparing Matrix
with Matrix A

we have the following values
a=2 ,b=4,c=8,d=-2
Thus a-b+c+d =2-4+8+(-2)=4