Question

Factor Completely: 3x2 - 21

Answer 1

factor out the GCF

Answer 2

what do both terms have in comon?

Answer 3

uhm im new to this

Answer 4

ok what do they have in common? it is a number

Answer 5

1) 3(x2 - 7)
2) 3(x + 7)(x - 7)
3) 3(x + 7)(x - 3)
4) Prime

Answer 6

idk but those are the possible answers

Answer 7

Prime means you can't factor it so it is not 4

Answer 8

do you know how to expand your choices? ie multiply them out

Answer 9

i am totaly confused

Answer 10

its a multiply choice question fyi

Answer 11

yes, I understand it is a multiple choice problem
The main goal of this site is to help you understand the mathematics
not to provide the solutions

Answer 12

oh really? well let me try mmmm

Answer 13

ok can you give me some factors of 21?
two numbers to multiply to give me 21

Answer 14

3x7

Answer 15

yes