## anonymous one year ago HELP!!!!!!! Calculate the discriminant. x2 – x – 2 = 0 9 7 –7 –9

1. welshfella

ax^2 + bx + c = 0 discriminant = b^2 - 4ac

2. anonymous

Can someone explain it to me step by step

3. anonymous

I dont understand how to do that, reasons why I needed help lol

4. anonymous

$Discriminant=b^2-4ac=\left( -1 \right)^2-4*1*-2=1+8=?$

5. anonymous

A am I right?

6. anonymous

@surjithayer

7. anonymous

correct