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(-1.2,0),(1.2,0)
v(0, -72)
50x^2-72=0 factor out 2
2(25x^2-36)=0
2(5x+6)(5x-6)=0
x=-6/5 and x=6/5
The average of these two is zero, substitute that into the equation and you get -72.

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Q: What are the zeros and vertex in this quadratic equation 50x2-72?
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