Question

factor completely -2x^2+3x+9 HELP

Answer 1

ok, can you find 2 numbers whose sum is +3 and product is -2*9=-18 ?

Answer 2

i cant im confused

Answer 3

what are the factors of 18 ?

Answer 4

12369

Answer 5

yes, so which 2 numbers among then will give you difference of 3 ?

Answer 6

1and2

Answer 7

that will give sum=18
since you have -18, you'll need difference =3

Answer 8

*that will give sum=3

Answer 9

oh ok so 6-3

Answer 10

yes!
so, you write middle term as
3x =6x-3x

Answer 11

-2x^2+3x+9
= -2x^2+6x-3x+9

can you solve further ?

Answer 12

just factor -2x from first 2 terms and -3 from other 2.

Answer 13

so i would get x^2+6x-3 right

Answer 14

-2x^2+3x+9
= -2x^2+6x-3x+9
=-2x(....- ....) -3 (...-...)
can you fill out the blanks ?

Answer 15

x-3 x-3

Answer 16

yes,-2x^2+3x+9
= -2x^2+6x-3x+9
=-2x(x-3) -3 (x-3)
now last step, factor (x-3) from above, what u get ?

Answer 17

im a lil confused not sure

Answer 18

-2x^2+3x+9
= -2x^2+6x-3x+9
=-2x(x-3) -3 (x-3)
=(-2x-3)(x-3)

its just like ab+cb = (a+c)b

Answer 19

ok thank you i understand how you get it when i see it complete i just not sure of the operations :)

Answer 20

welcome ^_^

Answer 21

hope you can help me with future probs ill probably be here all night

Answer 22

i hope so, too :)
but if i am unavailable, there r many to help you :)