You can put this solution on YOUR website! factor: the polynomial
2r^2+5r+4
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It's all positive numbers
It has to be (2r + a)*(r + b), a & b have to be 1 and 4 or 2 and 2.
Since 5 is odd a has to be odd.
--> (2r + 1)*(r + 4)
That doesn't work, so it can't be factored.
