Question

solve
(x+3)(x-9)=0

Answer 1

Given in that form, the answer is obvious. What do you think?

Answer 2

do i do foil?

Answer 3

It's a quadratic in factored form. How do you find your roots?

Answer 4

Just expand it. What's the problem here?

Answer 5

^Why would you expand it? That's redundant.

Answer 6

how do i expand it?

Answer 7

You don't expand it.

Answer 8

What should moriyah do? If not expand.

Answer 9

how do i do it? am i supposed to multiply using foil?

Answer 10

Your quadratic is already in factored form. What does that form tell you about the roots?

Answer 11

the instuctions just say to solve the equation

Answer 12

(x-r)(x-s) are you familiar with that?

Answer 13

What have you been learning about thus far?

Answer 14

we havent learned about roots and i am familiar with that

Answer 15

so what does each variable represent?

Answer 16

would it be x^2-5x-27?

Answer 17

Expand:
x^2-9x+3x-27=0
x^2-6x-27=0

Answer 18

Right?

Answer 19

Why would you expand? Explain.

Answer 20

And no, that is not right.

Answer 21

What kind of answer are you thinking of..? I don't understand.

Answer 22

Expanding an equation is not solving it. What is "solving" an equation?

Answer 23

Probably Moriyah's question is not literal. But it may be based on expanding. Please explain what you mean :O

Answer 24

solving an equation means to find the values of x. how would expanding help in anyway?

Answer 25

That's what you meant. How would you start to solve it?

Answer 26

you guys honestly don't know how to solve a quadratic in that form?

Answer 27

I honestly don't. I've only learned factoring and expanding from seeing this question.

Answer 28

But, please explain how you would start to solve it.

Answer 29

if you factor a quadratic, your basically finding the roots correct?
given a function in factored form, you already have the roots.

Answer 30

So where would you go from this question?