Question

Which of the binomials below is a factor of this trinomial?

3x2 + 18x - 21

Answer 1

First factor out the GCF 3


3x^2+18x-21


3(x^2+6x-7)


Then find two numbers that multiply to -7 and add to 6.

Answer 2

is it 3

Answer 3

x-3 or x+3

Answer 4

is a factor, but it's not a binomial

Answer 5

so the answer isn't 3

Answer 6

ok then the answer is 1

Answer 7

no

Answer 8

that's not a binomial either

Answer 9

ok im going to put the choices that they give me

Answer 10

alright

Answer 11

x - 3
x + 1
x - 1
x + 3

Answer 12

look at x^2+6x-7

what two numbers multiply to -7 and add to 6

Answer 13

im lost

Answer 14

what are the factors of 7

Answer 15

(x+1) (x-7)

Answer 16

you are close, but -7+1 = -6 NOT +6

Answer 17

so then its +7?

Answer 18

good, (x-1)(x+7)

Answer 19

thank you

Answer 20

sure thing