Question

help please?
Find the zeros
y = x^2 – 4x – 5

Answer 1

Have you tried factoring this equation?

Answer 2

First make sure it's in standard form correctly which it is then factor it out.

Answer 3

Theres no Greatest Common Factor (GCF)

Answer 4

I graphed it. is there something on a graph that is the zeros?

Answer 5

You should end up getting three answers for x

Answer 6

you can factor this equation

Answer 7

like take -1 and 4 out of 5?

Answer 8

so (x-1)(x+4)

Answer 9

When factoring, you are not looking for GCF, you are looking for number that when multiplied equal c and when added together (whether negative or positive) equal your b
So it would be

Answer 10

Yeah therefore you can set both of those equations equal to zero and solve for x

Answer 11

no, you are close though

Answer 12

Or if you graphed it simply look for where it crossed the x axis

Answer 13

what two numbers, when multiplied equal -5?

Answer 14

is it 5 instead of 4?

Answer 15

yes, but your signs are backwards
so (x+1)(x-5)

Answer 16

I get it now! so -1 and 5 are the zeros?

Answer 17

yes! :)

Answer 18

Thank you:)

Answer 19

yup