Question

3. Find (a + b)2 + (a - b)2. ​

Answer 1

Answer:

2a+2b +2a-2b

4a is Answer.

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Answer 2

Answer:

2(a²+b²)

Step-by-step explanation:

(a+b)²+(a-b)²

= (a²+ 2ab+ b²) + (a²- 2ab + b²)

then when we remove the brackets and take a constant term we get

=a²+ 2ab + b² + a² - 2ab + b²

=2(a²+b²)

(first cancel out +2ab and -2ab as the values result in a 0,

then you will be left with a² + b² + a²+ b², then combine them and you will get -> 2(a²+b²)

thanks.