Question

Algebra Help
Write each function in intercept form.
f(X)=-3x^2+24x-45

Answer 1

Here does this help? It explains better than I could.

http://blogformathematics.blogspot.com/2011/03/intercept-form-of-quadratic-equation.html

Answer 2

It does. Thank you.

Answer 3

Well actually that's not true. If we just factor the quadratics, we can find the intercept form duh

Answer 4

Oh.

Answer 5

So f(x) = 2x^2-8x+6
y = 2(x^2-4x+3)
y = 2(x-3)(x-1)

Answer 6

Where y = 2(x-3)(x-1) is the intercept form of f(x) = 2x^2-8x+6

Answer 7

Oh. Thank you. I understand it now.

Answer 8

I still need help with the second one.

Answer 9

I took first one out of the question.

Answer 10

-3x^2+24x-45=-3(x^2+8x-15)
I think you can continue alone from here

Answer 11

take out -3 and factor

Answer 12

Would it be 5 and 3?

Answer 13

Im not sure how to factor it.

Answer 14

use quadratic formula

Answer 15

is that a typo @myko shouldn't it be + 15?

Answer 16

and -8

Answer 17

then it would be -5 and -3

Answer 18

or notice that:
\((x-a)(x-b)=x^2-(a+b)x+ab\)
so in your case:
\(-(a+b)=8\)
and
\(ab=-15\)
solve this for a and b

Answer 19

So the answer would be f(x)=-3(x-5)(x-3) Right?

Answer 20

yes

Answer 21

Okay. Thank y'all for the help.

Answer 22

yw