Question

Multiple:(a-b+c)by(a-b-c)​

Answer 1

Answer:

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

Step-by-step explanation:

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