Question

Determine the exact values of the intercepts by using the quadratic formula. Then a calculator to evaluate the expressions that you obtain.

y=3x^2-12sqrt3x+36

Answer 1

seems pretty much cut and dry

Answer 2

which part of the instructions is giving you troubles?

Answer 3

I am just learning this the quad formula how do i determine a,b,c

Answer 4

a b and c never change; they are pretty well established as the general formula:

ax^2 +bx + x

in this case:

a = 3
b = -12 sqrt(3)
c = 36

Answer 5

i typoed my formula :)

ax^2 + bx + c

Answer 6

we can simplfy these as well and still get the same answer by dividing off a 3 from them

Answer 7

a = 3
b = -12 sqrt(3)
c = 36

a = 1
b = -4 sqrt(3)
c = 12

Answer 8

do i go 1x^2+-4sqrt3+12

Answer 9

not if you are trying to actuall use the quadratic formula itself.

Answer 10

\[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 11

ok then how do i do this

Answer 12

plug in the values for a b and c into that formula and math away on it

Answer 13

ok

Answer 14

just to give you something to go by for reference:

\[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
\[\frac{-(-4\sqrt{3})\pm\sqrt{(-4\sqrt{3})^2-4(1)(12)}}{2(1)}\]

Answer 15

whatdo i do after this point

Answer 16

"Determine the exact values of the intercepts by using the quadratic formula. Then a calculator to evaluate the expressions that you obtain."

That is where the math part come into the picture. all that adding, subtracting, multiplying and dividing amongst the numbers; and simplifying to get to a suitable answer .

Answer 17

do i take the -(-4sqrt3)and do something with this at the begining?

Answer 18

id make it positive and let it sit there till i did the messier part

Answer 19

ok

Answer 20

hunh ... that messier part goes to zero and youre left with 4sqrt(3)/2; which reduce to 2sqrt(3)

Answer 21

ok

Answer 22

thank for your patience