3. Without graphing, determine which function intersects the x-axis in exactly one point?
a. f(x) = 4x2 - 20x + 25
c. h(x) = 2x2 + 4x + 9
b. g(x) = -3x2 - 13x + 20
d. j(x) = -2x2 + 6x + 8
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3. Without graphing, determine which function intersects the x-axis in exactly one point?
a. f(x) = 4x2 - 20x + 25
c. h(x) = 2x2 + 4x + 9
b. g(x) = -3x2 - 13x + 20
d. j(x) = -2x2 + 6x + 8
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