Mathematics
Mermaid
2016-04-21 10:17:12
Find the zeros of the function. f(x) = 9x3 - 72x2 + 135x
ANSWERS
primadonna2587
2016-04-21 15:18:20

9x³-72x²+135x=0 9x(x²-8x+15)=0 9x(x-5)(x-3)=0 x=0 or 5 or 3 ☺☺☺☺

necha
2016-04-21 15:19:35

9x3=27; 72x2=144 so the right side condenses to 135x-117 f (x)=135x-117 so this function crosses the y axis at -117 and the x axis at .866666666 repeating.

ADD ANSWER