Homework Help

What is the discrimant of x^2-3x+2=0

user profile pic

monique06 | (Level 3) Valedictorian

Posted May 30, 2013 at 12:59 PM via web

dislike 0 like

What is the discrimant of x^2-3x+2=0

2 Answers | Add Yours

user profile pic

crmhaske | College Teacher | (Level 3) Associate Educator

Posted May 30, 2013 at 2:33 PM (Answer #1)

dislike 1 like

The discriminant of a quadratic function is defined as:


If this value is positive, then there exists real roots of the quadratic.  However, if it is negative, the roots are complex.  We know this because the formula comes from the quadratic formula:


And any number that contains the square root of a negative number is a complex number (`i=sqrt(-1)` ).

For` x^2-3x+2` : a=1; b=-3; c=2


Therefore, the roots of the function are real.


user profile pic

atyourservice | Student, Grade 11 | TA | (Level 3) Valedictorian

Posted February 24, 2014 at 2:45 AM (Answer #2)

dislike 0 like

`x^2-3x+2=0 `   to find the discriminant use the formula `b^2-4ac`

`a= 1`    `b= -3 `  `c=2`

`-3^2-4(1)(2)`  simplify it

`9-8=1 `   the discriminant is 1 meaning the problem has 2 real solutions as 1 is bigger than 0

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes