Question

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

Answer 1

Answer:

a^2+b^2+c^2.

I hope it HELPS you.................

.....✌✌✌✌✌✌

Answer 2

Answer:

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