Question

simplify (a+b+c) (a+b-c)​

Answer 1

Answer: a2+2ab+2ac+b+2bc+c2

Step-by-step explanation:(a+b+c) (a+b-c)​

                                            =a(abc) b(abc) c(abc)

                                            = a2+2ab+2ac+b+2bc+c2

Answer 2

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

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

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