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Komok [63]
3 years ago
14

42. Use the Quadratic Equation to find the Roots of x2 + 3x - 3 = 0

Mathematics
1 answer:
Ierofanga [76]3 years ago
6 0

Answer:

<h2>       Roots:  0.79 and 3.79</h2>

Step-by-step explanation:

x^2 + 3x - 3 = 0\\a=1\,,\ \ b=3\,,\ \ c=-3\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x=\dfrac{-3\pm\sqrt{3^2-4\cdot1\cdot(-3)}}{2\cdot1}=\dfrac{-3\pm\sqrt{9+12}}{2}=\dfrac{-3\pm\sqrt{21}}{2}\\\\x\approx0.79\quad or\quad x\approx3.79

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