Question

A+b=4 and a×b=2then a-b=?

Answer 1

hey mate here is ur answer

(a+b)²=a²+b²+2ab

16-4=a²+b²

a²+b²=12.

(a-b)²=a²+b²-2ab

(a-b)²=12-4

(a-b)²=8

(a-b)=root 8 or -root 8.

hope it helps.

☆☆☆

Answer 2

Answer:

root 8 or -root 8

Step-by-step explanation:

(a+b)²=a²+b²+2 ab  

16-4=a²+b²  

a²+b²=12.  

(a-b)²=a²+b²-2 ab  

(a-b)²=12-4  

(a-b)²=8  

(a-b)=root 8 or -root 8