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1 answer:

5 0

9x^2 - 16x + 60Find the discriminant, b^2 - 4ac, which is the same as the value of the radicand.(-16)^2 - 4 * 9 * 60 = -1904Since the discriminant is negative, there will be NO real solutions, and 2 complex solutions.
Part B.4x^2 + 8x - 5 = 0 The discriminant for this quadratic is 144 so it is factorable.(2x + 5)(2x - 1) = 0Set each factor equal to zero.2x + 5 = 0 2x - 1 = 0subt 5 from both sides add 1 to both sides2x = -5 2x = 1divide both sides by 2 divide both sides by 2x = -5/2 x = 1/2

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