Question

if a+b = 5 then a+b =?​

Answer 1

Answer:

$We have,\\∣a+b∣ 2 +∣a−b∣ 2 =(a+b)(a+b)+(a−b)(a−b)=a 2 +2ab+b 2 +a 2 −2ab+b 2 =2∣a∣ 2 +2∣b∣ 2 Therefore,∣a+b∣ 2 +∣a−b∣ 2 5 2 +(a−b) 2 =2(3 2 +4 2 )25+(a−b) 2 =50⇒∣a−b∣ 2 =25⇒∣a−b∣=5$

Step-by-step explanation: