#### gothamhero

##### New member

- Joined
- Nov 12, 2008

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I just can't solve this, I've been trying for 30 minutes...need help

14xsquared-x+15

14xsquared-x+15

- Thread starter gothamhero
- Start date

- Joined
- Nov 12, 2008

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I just can't solve this, I've been trying for 30 minutes...need help

14xsquared-x+15

14xsquared-x+15

- Joined
- Feb 20, 2005

- Messages
- 854

check the problem . I believe it should be 14x^2-x-15

14x^2 -x +15

factors of 14

1,14..... 2,7

factors of 15

1,15...3,5

we want a set whose sum of products add to 1

none exist, use binomial equation

x=-b+/- square root [b^2-4ac] all over 2a

x=1+/-[1-4[14][15]]^1/2 all over 28

x=1+/- [ 1-840]^1/2 all over 28

x=1+/- sqrt[-839] all over 28 complex roots

if the problem was

14x^2-x-15

we would have

[14x-15][x+1] answer

- Joined
- Nov 12, 2008

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Problem was prime, thank you though

- Joined
- Feb 20, 2005

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- 854

The factors of 14x^2-x+15 are complex numbers

[x-1-i sqrt839]/28 [x-1+i sqrt 839]/28

Arthur