Question

यदि (a + b)= 7 और a²-b² =-1 हो, तो (a-b) =?
(a) 1/7
(b)-7
(c)-1/7
(d)-1​

Answer 1

Answer:

option b is correct

Step-by-step explanation:

thank you for asking this question ☺️

Answer 2

Answer:

given

a+b=7

a²+b²=-1

answer

(a+b)= a²+b²+2ab

a²-b²= (a+b)(a-b)

-1=7•(a-b)

7 is in multiple

-1/7= (a-b)