Question

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

Answer 1

Answer:

nswer:

\begin{gathered} = > (a + b - c)(a - b - c) \\ = > (a - c + b)(a - c - b) \\ = > {(a - c)}^{2} - {b}^{2} \\ = > {a}^{2} - 2ac + {c}^{2} - {b}^{2} .\end{gathered}

=>(a+b−c)(a−b−c)

=>(a−c+b)(a−c−b)

=>(a−c)

2

−b

2

=>a

2

−2ac+c

2

−b

2

.

Answer 2

$(a + b + c)(a - b - c) \\ = a(a - b - c) + b(a - b - c) + \\ c(a - b - c) \\ \\ = {a}^{2} - ab - ac + ab - {b}^{2} - bc + \\ ac - bc - {c}^{2} \\ \\ = {a}^{2} - {b}^{2} - {c}^{2}$