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solve 300=22t+1.2t^2

 Sep 17, 2014

Best Answer 

 #1
avatar+130466 
+5

300=22t+1.2t^2    multiplying through by 10 to clear the decimal and rearranging, we have

12t2 + 220t -3000 = 0      divide through by 4

3t2 + 55t - 750 = 0          this can't be factored, so let's use the on-site calculator to solve it.....

3×t2+55×t750=0{t=(5×481+55)6t=(5×48155)6}{t=27.4430934995510907t=9.1097601662177573}

And there are the two solutions........

 

 Sep 17, 2014
 #1
avatar+130466 
+5
Best Answer

300=22t+1.2t^2    multiplying through by 10 to clear the decimal and rearranging, we have

12t2 + 220t -3000 = 0      divide through by 4

3t2 + 55t - 750 = 0          this can't be factored, so let's use the on-site calculator to solve it.....

3×t2+55×t750=0{t=(5×481+55)6t=(5×48155)6}{t=27.4430934995510907t=9.1097601662177573}

And there are the two solutions........

 

CPhill Sep 17, 2014

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