Question

What is the formula of (a+b)² and (a-b)²?​

Answer 1

Answer:

The formula of (a+b)² and (a-b)² are as follows:

Step-by-step explanation:

(a+b)²=a²+2ab+b²

(a-b)²=a²-2ab+b²

Answer 2

Step-by-step explanation:

These are identities .

$:\implies$ ( a + b)²

$:\implies$ ( a + b) ( a + b)

$:\implies$ a ( a + b ) + b ( a + b)

$:\implies$ a² + ab + ab + b²

$:\implies$ a² + 2ab + b²

• Now ( a - b)²

$:\implies$ ( a - b)²

$:\implies$ ( a - b) ( a - b)

$:\implies$ a ( a - b ) - b ( a - b)

$:\implies$ a² - ab - ab + b²

$:\implies$ a² - 2ab + b²