Question

if (a+b) =
5 and ab =2 fond the value of (a+b)²​

Answer 1

Answer:

(a + b) =5, ab = 2, (a + b)^2 = ?

where (a + b)^2 = a^2 + b^2 + 2ab

So, putting the values in the formula we get.

(5)^2 = a^2 + b^2 + 2(2)

25 = a^2 + b^2 + 4

a^2 + b^2 = 25 - 4

a^2 + b^2 = 21

Explaination:

if you need (a + b)^2 so you simply square the value of (a + b) and you will get (a + b)^2 = 25.