Question

please solve and send me

Answer 1

$a = 1\: \: \: \: \: b = 2\: \: \: \: c = - 1 \\ 2 {a}^{2} - {b}^{2} c + 3abc \\ 2 {(1)}^{2} - {(2)}^{2} ( - 1) + 3(1)(2)( -1) \\ 2 + 4 - 6 \\ 6 - 6 = 0$

Answer 2

2^1 square=2-2square^-1+3^1^-1

=-1