angelique18
Find a cubic function with the given zeros.
Square root of six.,  Square root of six., 3
f(x) = x3  3x2  6x  18
f(x) = x3 + 3x2  6x  18
f(x) = x3 + 3x2 + 6x  18
f(x) = x3 + 3x2  6x + 18



This Question is Open

triciaal
Best Response
You've already chosen the best response.
1
(x +6)(x6)(x+3) = 0

angelique18
Best Response
You've already chosen the best response.
0
i have x^3+3x^236108=0

triciaal
Best Response
You've already chosen the best response.
1
you have to multiply each term
someone else was also responding. i guess he changed his mind
i will do it now

triciaal
Best Response
You've already chosen the best response.
1
you forgot your x
then factor the 6

triciaal
Best Response
You've already chosen the best response.
1
x^3 + 3x^236x108

sleung
Best Response
You've already chosen the best response.
0
\[(x\sqrt{6})(x+\sqrt{6})(x+3)=0\] I think you can expand from here.

angelique18
Best Response
You've already chosen the best response.
0
how did you get it?

triciaal
Best Response
You've already chosen the best response.
1
sorry i made a mistake it should be as above rt 6

triciaal
Best Response
You've already chosen the best response.
1
(xrt6)(x +rt6)(x+3)
recognise the difference of 2 squares?
(x^26)(x+3)
expaND
X^36X+3X^218
Rearrange to put in order of degree
x^3 +3x^2 6x18

triciaal
Best Response
You've already chosen the best response.
1
sorry recognize