Answer:
Step-by-step explanation:
Note: x2-16x + 64 = 0 should be written x^2 - 16x + 64 = 0. The coefficients are a = 1, b = -16 and c = 64. The discriminant, b^2 - 4ac, is (-16)^2 - 4(1)(64) = 0. A zero discriminant indicates that there are two equal, real roots.
Note: 3x2 + 6x + 4 = 0 => 3x^2 + 6x + 4. The coefficients a, b and c are {3, 6, 4} and so the discriminant is b^2 - 4ac, or 36 - 48, or -12. A negative discriminant indicates that there are two complex, unequal roots.
Note: 2x2 - 10x + 6 = 0 => x^2 - 5x + 3, whose coefficients are {1, -5, 3}. The discriminant is (-5)^2 - 4(1)(3) = 13. A positive discriminant indicates that there are two unequal, real roots.
