Question

Colin needs to find negative factors of 336 that have a difference of 8 units. Which equation could Collin use to find the smaller negative factor?

x2 + 8x – 336 = 0
x2 – 8x + 336 = 0
x2 – 4x – 328 = 0
x2 + 4x + 328 = 0

Answer 1

@Nnesha @wio @robtobey @hartnn @perl

Answer 2

first produce a system of equations for the direction

Answer 3

How

Answer 4

find negative factors of 336 that have a difference of 8 units.
Assume x is greater than y

x*y = 336
x - y = 8

solve this system

Answer 5

What is x and y

Answer 6

they are unknowns

Answer 7

You could label them a, b if you want

Answer 8

So thats the equation

Answer 9

it might be able to answer this easier if you look at the given choices

Answer 10

`x^2 + bx + c = 0`
to factor this you have to find two factors of `c` that add up to `b`

Answer 11

So either A or B

Answer 12

right

Answer 13

B

Answer 14

@perl ^

Answer 15

yes that sounds correct

Answer 16

since two negatives make a positive when you multiply

Answer 17

Right

Answer 18

we want two negative factors of 336 , and (-)(-) = +

Answer 19

Right