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OpenStudy (anonymous):
Find x using the quadratic formula 2x^2 + 14 x - 231 = 0 I get x as 2.48 and -4.7 Am I correct? Thx
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OpenStudy (anonymous):
\[x_{1}=7.802654555\] \[x_{2}=-14.80265456\] I recommend you to buy this calculator is useful and practical Casio fx-991ES
OpenStudy (anonymous):
Could you please help me out with this problem?
OpenStudy (anonymous):
I have an equation like this: 2pi(r)^2+14pi(r)-231=0 Find the value of r?
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