Question

What is the discriminant for the quadratic expression? 24x2 + 13x A. 73 B. 524 C. 265 D. 169

Answer 1

the discriminant is the bit in the quaratic equaiton under the squaer root sign
that is b^2-4ac
3 cases
if
b^2-4ac>0, there are 2 real roots
b^2-4ac=0, there is 1 real root
b^2-4ac<0, there are 2 imaginary roots


ax^b+bx+c=0

24x^2+13x
a=24
b=13
13^2-4(24)
169-96
73
discriminatn is 73 A