5
step-by-step explanation:
"standard form:
3x2 + 14x − 10 = 0
solutions based on quadratic formula:
x1 = −14 − √ 142 − 4×3×(−10) / 2×3 = −14 − 2 × √ 79 / 6 ≈ −5.296
x2 = −14 + √ 142 − 4×3×(−10) / 2×3 = −14 + 2 × √ 79 / 6 ≈ 0.629