Question

The expansion of ( a + b )2

+ (a – b )2

is

a. 2ab b . 4ab c. – 4ab d. 2a2 + 2b2​

Answer 1

Answer:

(a +b)2 = a2 + 2ab + b2. 2. (a - b)2 = a2 - 2ab + b2.

Step-by-step explanation:

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Answer 2

Answer:

d.

Step-by-step explanation:

(a+b)2 + (a-b)2

using algebraic identity

A2 + 2ab + b2 + A2 -2ab + b2

2ab terms will cancel out each other.

so on adding like terms

we get

2a2 + 2b2