Question

If a + b = 5 and ab = 10, find the value of a2+ b2

Answer 1

a+b = 5

ab = 10

(a+b)² = a²+b²+2ab

5² = a²+b²+2(10)

25 = a²+b²+20

So......

a²+b² = 5

Thnx ✌️✌️✌️

Answer 2

If a + b = 5 and ab = 10 then a² + b² = 5

Given :

a + b = 5 and ab = 10

To find :

The value of a² + b²

Formula :

a² + b² = (a + b)² - 2ab

Solution :

Step 1 of 2 :

Write down the given data

Here it is given that

a + b = 5 and ab = 10

Step 2 of 2 :

Find the required value

a² + b² = (a + b)² - 2ab

⇒ a² + b² = 5² - 2 × 10

⇒ a² + b² = 25 - 20

⇒ a² + b² = 5

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ how many terms are there in an expression 12ab -24b +36a

https://brainly.in/question/22764723

2. On common factorization 12a+9 becomes 3a(4a+3) 

https://brainly.in/question/30544360

3. Solve the equation 12p-11=25

https://brainly.in/question/26811798