f(x)=3x^2+30x-75

where f(x) intersects the x-axis.
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1 Answer

3x^2 +30x -75=0

yuze quadratik equashun & get

x=2.0710678 or -12.0710678

-b/2a=-5

b^2 -4ac=1800, so root=42.426406871 & root/2a=7.0710678118
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