Question

Algebraically find the exact real zeros and state the multiplicity of each.
f(x) = 2x^2+ 9x - 5

These really confuse me and I have a bunch of them to do so please explain it well!

Answer 1

1-2 and -5

Answer 2

Solve with quadratic formula.

Answer 3

That's not how the example is shown, it like, factors it backwards.

Answer 4

Or algebraically factor getting (x+5)(2x-1)
x=-5
x= 1/2

Answer 5

I was just about to type that radar.. haha

Answer 6

Just try and play around with factoring.. And appreciate the fact that you aren't in Calc2.. :/

Answer 7

O.K. hope EvaMonster can do it both ways.

Answer 8

Thank you both!