Question

Pls answer this fast..

If (a+b)=7 and (ab)=10; find (a-b)​

Answer 1

Answer:

(a - b) = 3

Step-by-step explanation:

Given : (a + b) = 7

ab = 10

To find : (a - b)

Solution :

(a + b)² = (a - b)² + 4ab

Now, by putting the values

➾ 7² = (a - b)² + 4 × 10

Multiply

➾ 49 = (a - b)² + 40

Now, moving the term from RHS to LHS

➾ 49 - 40 = (a - b)²

Subtract

➾ 9 = (a - b)²

Take the square root on both the sides

➾ √9 = √(a - b)²

Calculate the root

➾ 3 = (a - b)

or (a - b) = 3

∴ Hence, the value of (a - b) is 3

Answer 2

Answer:

Note: See Attachment!

Hope my answer helps you a lot!

Step-by-step explanation: