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For problems 1-2 write the value of the discriminant of each equation, decide how many different real-number roots the equation has, and determine how many points the parabola will intersect with the x-axis. Do not solve the equation.
1.x^2+7x+9=0
A.discriminant is 13, indicating only one real root, with the parabola intersecting the x-axis at only one point
B.discriminant is 13, indicating there are two real roots, with the parabola intersecting the x-axis at two points
C.discriminant is 13, indicating there are two real roots, with the parabola intersecting the x-axis at only one point, (13, 0)
2.2x^2+5x+7=0
A.discriminant is -31, indicating there are two real roots, with the parabola intersecting the x-axis at two places
B.discriminant is -31, indicating there are two real, negative roots, with the parabola intersecting the x-axis at two places. C.discriminant is -31, indicating there are no real realr
2006-08-25
13:40:20
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3 answers
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asked by
joe j
1