Question

a-b=4 and a²-b²=8 then find the value of a+b​

Answer 1

Answer:

2

Step-by-step explanation:

$a {}^{2} - b {}^{2} = (a - b)(a + b)$

put the given value

now,

8=4(a+b)

a+b=8/4

Hence,a+b=2

also a=3

b= -1

Answer 2

Answer:

a + b = 2

Step-by-step explanation:

Using identity a² - b², we get,

a² - b² = (a-b)(a+b)

Since, the value of a² - b² is given as 8

and the value of a - b as 4,

Therefore, a² - b² = (a-b)(a+b)

=> 8 = 4(a+b)

=> 8/4 = a+b

=> 2 = a+b