Question

Hey mate pls answer my question.. From chapter Matrices
[a+b ab] = [6 8]
Find the value of a and b

Answer 1

Answer:

Step-by-step explanation:

Since there are two equations and two unknowns a and b, value of a and b can be determined as follows.

a+b=6

or, a=6−b

Now, ab=8

Substitute the value of a in this equation to get,

ab=(6−b)b=8

or, 6b−b2=8

or,b2–6b+8=0

We can write this equation as: b2–4b−2b+8=0

or, b(b−4)−2(b−4)=0

or,(b−2)(b−4)=0

This means that b=2 or b=4.

Now a=6-b

For b=2,a=6–2=4;

For b=4,a=6–4=2;

This means that the values of a and b are 2 and 4 in any order meaning if a is taken to be 2 then b becomes 4 and vice versa.

Answer 2

heya !

please refer this attachment


thanks !