tolong dijawab dg caranya.. please

1. 3x² + 10x - 8 = 0
a = 3, b = 10, c = -8
X1,X2 = -b ± √b² - 4ac/2a
= -10 ± √10² - 4×3×(-8)/2×3
= -10 ± √100 + 96/6
= -10 ± √196 / 6
= -10 ± 14 / 6

X1 = -10 + 14 / 6
= 4/6 = 2/3

X2 = -10 - 14 / 6
= -24/6 = -4
Hp = -4 atau 2/3 = B

2. SOALNYA KELIRU