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Unlimited Practice: Zeros

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1. What are the zeros of the function $y = x^{2} - 12 x + 20$ ?

$\left\{-26, 38\right\}$

$\left\{6 - 4 i, 6 + 4 i\right\}$

$\left\{2, 10\right\}$

$\left\{-10, -2\right\}$

2. Using a calculator, find the real zeros of the function $y = 3 x^{2} - 9 x + 3$ , to the nearest thousandth

$\left\{1.5 - 1.118 i, 1.5 + 1.118 i\right\}$

$\left\{-6.0, 9.0\right\}$

$\left\{-2.618, -0.382\right\}$

$\left\{0.382, 2.618\right\}$

3. Using a calculator, find the real zeros of the function $y = 10 x^{2} - 8 x + 4$ , to the nearest thousandth

$\left\{-0.4 - 0.49 i, -0.4 + 0.49 i\right\}$

$\left\{4.0 - 4.899 i, 4.0 + 4.899 i\right\}$

No real zeros

$\left\{-0.09, 0.89\right\}$

4. Use the quadratic formula to find the real zeros of the function $y = - 6 x^{2} + 7 x + 10$

$\left\{\frac{7}{12} - \frac{17 i}{12}, \frac{7}{12} + \frac{17 i}{12}\right\}$

$\left\{- \frac{5}{6}, 2\right\}$

$\left\{- \frac{5}{3}, 4\right\}$

$\left\{-2, \frac{5}{6}\right\}$

5. What are the zeros of the function $y = x^{2} - 17 x + 30$ ?

$\left\{4, 30\right\}$

$\left\{-76, 93\right\}$

$\left\{\frac{17}{2} - \frac{13 i}{2}, \frac{17}{2} + \frac{13 i}{2}\right\}$

$\left\{2, 15\right\}$

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