Question

(a + b - c) (a – b + c)​

Answer 1

Step-by-step explanation:

(a+b-c)(a-b+c)

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

= a² - ab + ac + ba -b² + bc - ca + cb- c²

= a² - b² - c²

Answer 2

Answer:

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