, or x=2.21327 and -0.81327
![\left[\begin{array}{ccc}?&9\\-5x^2&?\\\end{array}\right]](/tpl/images/0562/6581/4ad81.png)
and add up to 7x
, given a quadratic 
Solve.
-5x^2+9+7x = 0−5x
2
+9+7x=0...
Answers: 2
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