Question

Factor completely: 2x^2 + 9x + 4

Answer 1

hint: find two numbers that multiply to 8 and add to 9

Answer 2

2 and 4 + 9 = 17

Answer 3

not sure what you're saying exactly

Answer 4

sorry

Answer 5

2*4=8 + 9=17?

Answer 6

how about 1 and 8

1*8 = 8

1+8 = 9

Answer 7

see how I got that?

Answer 8

ah yeah ok.

Answer 9

to be honest I wasn't sure what you were doing with adding on 9 to 8 to get 17

Answer 10

here are my choices:

(2x + 2)(x + 2)

(2x + 1)(x + 4)

(2x + 4)(x + 1)

(2x + 2)(x + 4)

Answer 11

anyways, you break up 9x into 1x + 8x to get

2x^2 + 9x + 4

2x^2 + 1x + 8x + 4

then you factor by grouping

Answer 12

ok and = 2x^2 + 9x +4

Answer 13

then it would be 2x+1)(x+4)?

Answer 14

correct

Answer 15

ok thanks!

Answer 16

you can check the answer by distributing it back out (or FOILing it back out)