Question

8. Simplify: (a + b + c)(a + b -c)
O a2 + b2 – c2 - 2ab
O a2 + b2 + c2 + 2ab
O a? + b2 – c2 + 2ab
O a2 - b2 - c2 + 2ab
O
Other:​

Answer 1

Step-by-step explanation:

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

(c)