Tell whether you can make a unique triangle with sides measuring 5cm, 4cm, and 20cm.
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I got x < 2 for the inequality
Look at the image for more information
Look at the image for more information
Your formula for this is 
and 
. Get everything on one side of the equals sign, set it equal to 0 and factor. When you do this you get (x-3)(x+27). The Zero Product Property rule tells us that either x-3 = 0 or x+27 = 0 and that x = 3 and -27. The only thing in math that will NEVER be negative besides time is distance/length, therefore, x cannot be 27 and has to be 3.