Question

Subtract (a - b)² ? from (a + b)²? is​

Answer 1

Step-by-step explanation:

=(a+b)² – (a–b)²

= a²+b²+2ab–a²–b²+2ab

=4ab

this is the correct answer

Answer 2

Subtract ( a - b)² from ( a + b)²

Answer:

4ab

Explanation:

➞ ( a + b)² - ( a - b)²

[ By using identity: (a + b)² = a² + 2ab + b² ]

➞ a² + 2ab + b² - ( a - b )²

[ By using identity: (a - b)² = a² - 2ab + b² ]

➞ ( a² + 2ab + b²) - ( a² - 2ab + b² )

[ Multipying each term of the second half by (-1) ]

➞ a² + 2ab + b² - a² + 2ab - b²

[ Combining like terms ]

➞ ( a² - a² ) + ( b² - b² ) + ( 2ab + 2ab )

➞ 0 + 0 + 4ab

➞ 4ab

4ab is the answer.