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September 19, 2014

September 19, 2014

Posted by **Trina** on Friday, September 3, 2010 at 5:54pm.

4x^2-27x+45

- algebra -
**drwls**, Friday, September 3, 2010 at 6:06pmThe discriminant is b^2 - 4 ac = 729 -720 = 9. Since the square root of that is an integer (3), the polynomial can be factored.

The roots are (1/8)[27 +/-3] = 30/8 and 3

4x^2-27x+45 = (x-3)(4x- 15) are the factors

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