Question

y=3x²-X-2 ???????????????????????????

Answer 1

x= -b +- √b² -4 . a . c /2 . a
x= -(-1) +- √(-1)² -4 . 3 . -2 / 2 . 3
x= 1 +- √1 +24 /  6
x= 1 +- √25 / 6
x= 1 +- 5 / 6
x linha= 1 + 5 / 6 → 6/6→ 1
x duas linhas= 1 - 5 / 6 → -4/6→ -2/3