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A + B = 8, A – B = 4 then A2 – B2 = ?

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A + B = 8, A – B = 4 then A2 – B2 = ?
1. 16
2. 28
3. 32
4. 12
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Correct Answer - Option 3 : 32

Given: 

A + B = 8

A – B = 4

Formula used:

 (A + B) (A – B) = A2 – B2 

Calculation:

Put the value of A + B and A – B 

Then, A2 – B2    

= 8 × 4

= 32 

∴ The required answer is 32 .

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