Question

if a+b =[7 4 8 9] and a-b =[1 2 0 3] find value of a​

Answer 1

Answer:

a = [4 3 4 6]

Step-by-step explanation:

(a+b)+(a-b) = [7 4 8 9] + [1 2 0 3]

2a = [8 6 8 12]

a = [4 3 4 6]

Answer 2

Answer:

The correct answer is [4 3 4 6]

Step-by-step explanation:

Given: a+b =[7 4 8 9] and a-b =[1 2 0 3]

To find: Value of a

the given equations are

a+b =[7 4 8 9] .................(1)

and a-b =[1 2 0 3]...................(2)

add equation 1 and 2,

then we get,

2a= [7 4 8 9] + [1 2 0 3]

2a = [8 6 8 12]

a=1/2 [8 6 8 12]

after divinding with 2, we get

a = [4 3 4 6]

the final answer is [4 3 4 6]