Question

if a+b=4 and a-b=2 then the value of a2-b2=​

Answer 1

Answer:

a^2-b^2

=(a+b)(a-b)

=4×2

=8

Hope this will help you

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Answer 2

If a + b = 4 and a - b = 2 then a² - b² = 8

Given :

a + b = 4 and a - b = 2

To find :

The value of a² - b²

Concept :

a² - b² = ( a + b ) ( a - b )

Solution :

Step 1 of 2 :

Write down the given data

Here it is given that a + b = 4 and a - b = 2

Step 2 of 2 :

Find the value of a² - b²

a² - b²

= ( a + b )× ( a - b )

= 4 × 2

= 8

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