Answers

2016-07-31T12:56:54+08:00
B²-4ac
9²-4(1)(20)
81-80
1
d>0
2 real and unequal roots
0
What's Connect?
The formula for discriminant is b²-4ac
What?Wrong answer!
https://m.mathway.com/examples/Algebra/Quadratic-Equations/Finding-the-Discriminant?id=50
2016-07-31T13:01:14+08:00
Your question is wrong.
x2-9x+20=0

These numbers are -5 and -4
x2-9x+20=0 (x-5)(x-4)=0

Now solve for "x" (x-5)(x-4)
either (x-5)=0 or (x-4)=0
if (x-5)=0,then x=5
if (x-4)=0,then x=4

answer:x=5 or x=4
0