Question

Resolva a equação

2 4 1
2 4 x = 0
3 1 2

Answer 1

Oi Lilian

2   4   1   2   4
2   4   x   2   4
3   1   2   3   1

det = 16 + 12x + 2 - 12 - 2x - 16 = 0

10x - 10 = 0

10x = 10

x = 1