Find the number of solutions of the equation. 0 = x2 + 2x + 9

asked Nov 21, 2018 235k views

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$x^2+2x-9=0\\ \Delta=2^2-4\cdot1\cdot(-9)=4+36=40\ \textgreater \ 0\Rightarrow\text{two solutions exist}$

Sam Lee answered Nov 27, 2018

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