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20 12 how to solve the question 10 of Tianjin junior high school graduates' mathematics test paper?
Choose C.

(1) If x=2 and x=3 are the roots of the equation, you can get m=0 by substitution, but the title does not give the value of m, then the conclusion 1 cannot be determined.

(2) The equation has two unequal real roots. From the discriminant, it can be concluded that 2 is correct.

(3) The relationship between root and coefficient is: x 1+x2 = 5, x 1. X2 = 6 meters.

Convert the quadratic function into a general form: y = x2-(x1+x2) x+x1x2+m, and substitute it into the above formula to get y=x2-5x+6.

Let y=0, x2-5x+6=0, and the two points are 2 and 3 respectively, that is, the coordinates of the intersection of the function and the X axis are (2,0) and (3,0), so 3 is correct.