prentice hall algebra 1 chapter10 practice answers
2x^2 - 4x - 6 = 0 \). Solution: Identify coefficients: \( a=2, b=-4, c=-6 \) Compute discriminant: \( D = (-4)^2 - 4 \times 2 \times (-6) = 16 + 48 = 64 \) Apply quadratic formula: \( x = \frac{-b \pm \sqrt{D}}{2a} = \frac{4 \pm 8}{4} \) Solutions: \( x = \frac{4 + 8}{4} = 3 \)