Question 131278This question is from textbook structure and method
: Please help me. I am so clueless with this question. It asks: In the equation ax^2+bx+c=0, the value of b^2-4ac is called the dicriminant of the quadratic equation. What does this value tell you about the real roots of the equation?
I tried to solve this, but math is not my best subject. Please help me! Thank You=)
This question is from textbook structure and method
Answer by scott8148(6628)   (Show Source):
You can put this solution on YOUR website! x=(-b+-sqrt(b^2-4ac))/2a __ this is the quadratic formula for finding the roots
notice that the discriminant is the quantity which has the square root taken
if the discriminant is a positive perfect square, then the roots are rational numbers
if the discriminant is positive (but not a perfect square), the roots are irrational
if the discriminant is zero, then the roots are equal
if the discriminant is negative, the roots are imaginary (not real)
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