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Find all values of $t$ such that $8t^2 \le 3-10t$.

 Feb 28, 2018
 #1
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8t^2 ≤ 3 - 10t     rearrange as

 

8t^2 + 10t - 3 ≤ 0    factor

 

This graph may help :

 

https://www.desmos.com/calculator/tmxfctalnk

 

The values that make this true  are   t  =   [ -1.5, 0.25 ]

 

 

cool cool cool

 Feb 28, 2018

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