Question

(a + b + c) (a + b – c)
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Answer 1

Step-by-step explanation:

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

(a+b) ^2-(c)^2

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Answer 2

Answer:

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The answer of your question is given below

Step-by-step explanation:

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

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

${a}^{2} + ab - ac + ab + {b}^{2} - bc + ac + bc - {c}^{2}$

${a}^{2} + {b}^{2} - {c}^{2} + 2ab$