answersLogoWhite

0

You do not need the quadratic formula, since this can easily be factored in to linear factors.

x2 + x - 20 = (x - 4)(x + 5), thus, x = 4 or 5.

But, using the quadratic formula:

(-b +- sqrt(b2 - 4ac))/2a = (-1 +- sqrt(1 + 80))/2

(-1 + 9)/2 = 4

(-1 - 9)/2 = -5

User Avatar

Wiki User

15y ago

Still curious? Ask our experts.

Chat with our AI personalities

ViviVivi
Your ride-or-die bestie who's seen you through every high and low.
Chat with Vivi
DevinDevin
I've poured enough drinks to know that people don't always want advice—they just want to talk.
Chat with Devin
CoachCoach
Success isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach

Add your answer:

Earn +20 pts
Q: The answer to 0 equals x2 plus x-20 using the quadratic formula?
Write your answer...
Submit
Still have questions?
magnify glass
imp