Question

simplify this expression.3x squared - 15x+12. show your work.

Answer 1

x=1
x=4

Answer 2

how

Answer 3

use the quadratic formula:
\[x=(-b \pm \sqrt{b²-4ac}) / (2a)\]
\[x=(15\pm \sqrt{15² - 4.(3).(12)})/2.(3)\]
\[x=(15\pm \sqrt{225-144})/6\]
\[x=(15\pm9) / 6\]

\[x= 24/6 = 4 \]
or
\[x= 6/6 = 1\]