Question

19. The value of 49² is:- *

(50)² - 2 (50) (1) + (1)²
(50)² + 2 (50) (1) + (1)²
(50)² - (1)²
(50)² + (1)²​

Answer 1

Step-by-step explanation:

Hope that the attachment helps you in better understanding.

Answer 2

The value of 49² is (50)² - 2 (50) (1) + (1)²

Given :

The expression 49²

To find :

The value of 49² is

• (50)² - 2 (50) (1) + (1)²

• (50)² + 2 (50) (1) + (1)²

• (50)² - (1)²

• (50)² + (1)²

Formula :

(a - b)² = a² - 2ab + b²

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 49²

Step 2 of 2 :

Find the value of the expression

We use the formula

(a - b)² = a² - 2ab + b²

Thus we get

$\displaystyle \sf{ {(49)}^{2} }$

$\displaystyle \sf{ = {(50 - 1)}^{2} }$

$\displaystyle \sf{ = {(50)}^{2} - 2 \times 50 \times 1 + {(1)}^{2} }$

$\displaystyle \sf{ = {(50)}^{2} - 2 ( 50 )( 1 )+ {(1)}^{2} }$

Hence the correct option is (50)² - 2 (50) (1) + (1)²

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ divide : (4x²- 100) ÷ 6(x+5)

https://brainly.in/question/15559404

2. Find the value of the expression a² – 2ab + b² for a = 1, b = 1

https://brainly.in/question/28961155