Question

derive (a+b) (a-b)
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Answer 1

Answer:

a^2 - b^2

Step-by-step explanation:

⇒ ( a + b )( a - b )

⇒ a( a - b ) + b( a - b )

⇒ a^2 - ab + ab - b^2

⇒ a^2 - b^2

  Hence ( a + b )( a - b ) = a^2 - b^2

                Or multiply directly,

⇒ ( a + b )( a - b )

⇒ a^2 - ab + ab - b^2

⇒ a^2 - b^2

   In all the cases derived thing will be same

Answer 2

Step-by-step explanation:

(a+b)(a-b)

=a(a-b)+b(a-b)

=a²-ab+ab-b²

=a²-b²

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