So, values of x are: 
Step-by-step explanation:
We need to find the square root of 5x^2 = 300
Writing in mathematical form:

Divide both sides by 5


Taking square root on both sides






So, values of x are: 
Keywords: Square root
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1 - 2/3 = 1/3
1+ (-1/3) = 2/3
The answer is $560 before it become $480 becuz of a $80 price drop