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Roots squared

Algebra Level 3

\[\large 2x^2-3x+9=0\]

Given that \(x_1\) and \(x_2\) are the roots of the equation above. Find \(x_1^2+x_2^2\).

\[\frac 32\] \[- \frac {27}4\] \[\frac 92\] \[\frac 94\]

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by Ronald Chén

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