Question

Please help me-Algebra 1! WILL FAN/REWARD MEDAL!!!!!!!!!!!!!!!
Find all values of k so that the trinominal x^2 + kx -35 can be factored using integers.

Answer 1

all the factors of 35

Answer 2

find that and see all the possible sums

Answer 3

all the possible factors of 35 are 1, 5, 7, and 35...

Answer 4

-35

Answer 5

?
i do not understand.

Answer 6

Need the factors of -35, not 35

Answer 7

^

Answer 8

Oh. Thanks.
-1, -5, 7, 35...?

Answer 9

But none of them works to make 1 in kx, though.

Answer 10

I got k = +/- 34, +/- 2

Answer 11

basically -1*5*7=-35
or -1*1*35-35
so you can have -1 anywhere in between there so,
-5+7 = -2
5-7=2

-35+1=-34
35-1 = 34

Answer 12

as dan815 already explained :DD

Answer 13

I do not understand the part where you said that -5 +7 = -2 so 5-7=2
5-7=-2, dan.

Answer 14

write out the possible integer factors without knowing k

Answer 15

it came from factoring using AC method,

when you have Ax^2 + Bx + C, and if this can be factors,
B can be found two numbers that multiply to AC and add to B

Answer 16

(x-1)(x+35) = ?
(x+1)(x-35) =?
(x+7)(x-5)=?
(x-7)(x+5)=?

Answer 17

i in algebra 1 too! ;)

Answer 18

expand those brackets out

Answer 19

the constant comes from multiplying only the interger parts

Answer 20

the coefficient on the x^2 comes from multiplying only the x parts