Question

Solve by factoring.
4x2 + 23x + 15 = 0

Answer 1

ooh i like these

Answer 2

\[ax^2+bx+c=0\]

So what you want to do is find factors of a*c that have product a*c and sum b.

Answer 3

(x+5)*(4*x+3)

Answer 4

Good! Can you help me?

Answer 5

find two factors*

Answer 6

So what is a here?
And what is b here?
And what is c here?

Answer 7

\[4x ^{2}+23x+15=0\]

Answer 8

(x+5)*(4*x+3)

x= -5 and -3/4 right

Answer 9

@timo86m I don't think it helps to give the answer. Can you explain how you got those factors?

Answer 10

A:x = 0.8 or x = -0.75 C:x = 0.75 or x = 5
B:x = -3 or x = -1.25 D:x = -0.75 or x = -5

Answer 11

@Makayla43 if you want to learn this, I'm trying to teach you.

Answer 12

What is a,b, and c in your equation?

Answer 13

@KNicksfan4life :D (:

Answer 14

(4x-3)(x-5)

Answer 15

@freckles what do you mean a,b,and c?

Answer 16

is that rite

Answer 17

it not right

Answer 18

\[ax^2+bx+c=0\]
\[4x^2+23x+15=0\]

Answer 19

(x+5)*(4*x+3) if you not sure you can always expand this

Answer 20

Solve by factoring.
-3x2 - x + 2 = 0

Answer 21

-(x+1)*(3*x-2)

Answer 22

\[-3x ^{2}-x+2=0\]

Answer 23

-3x2 - x + 2 = 0
you actually mean

-3x^2 - x + 2 = 0

Answer 24

A:x = 0.5 or x = 0.33333 C:x = 1 or x = -0.66667
B:x = 0.33333 or x = -2 D:x = -1 or x = 0.66667

Answer 25

I think it d

Answer 26

You guys how is this teaching and how is this learning?
Please try to teach @Makayla43 and not just give the answer.
And @Makayla43 you shouldn't be just looking for answers.
I think freckles here was trying to teach you how to do this.

Answer 27

Omg.

Answer 28

i teached, I said expand my factor if she doubts it lol.

Answer 29

But @timo86m how do you get the factors? Please explain that part so she will know how to do it.

Answer 30

Goodbye. He sent me a message a explained.

Answer 31

4x2 + 23x + 15 = 0
number that up to 15 and product is 23

Answer 32

To factor is mostly guess work that is where I draw the line :)

Answer 33

number that up to c and product is b coefficient.

It is more important to show why it works then how to do something that is mostly guess work.