0
Anonymous
x2+x-15 = 0
Using the quadratic equation formula:
x = 3.405124838 or x = -4.405124838
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depends what 'a' =
-0.5
It can't be solved because the discriminant of the given quadratic equation is less than zero meaning it has no real roots.
Y=15/(2c+2x)
5x+y=-7 3x+y=15 8=D