Asked by bria
2x^2+7x+3/x^2-2x-15
Answers
Answered by
Dr. Jane
Do you mean..
(2x^2 +7x+3)/(x^2 -2x -15)
You have to factor the numerator and the denominator and remove the common factors.
Can you factor these or do you need help?
(2x^2 +7x+3)/(x^2 -2x -15)
You have to factor the numerator and the denominator and remove the common factors.
Can you factor these or do you need help?
Answered by
bria
need help
Answered by
PsyDAG
[(2x+1)(x+3)]/[(x-5)(x+3)} = ?
Answered by
Dr. Jane
Do you understand how you actually factor?
There is the guess method where you
would begin with:
x^2 -2x-15
(x- ) (x + )
I know that I need x in the front because x times x = x^2
I know that I need a plus and minus sign because 15 is negative and I will need to mulitply a + and a - number to get -15
Next, I have to think of two numbers that multiply to equal 15 and add to be -2 for the -2x portion.
It gets more complicated with 2x^2.. but it works basically the same way by guessing.
There is the guess method where you
would begin with:
x^2 -2x-15
(x- ) (x + )
I know that I need x in the front because x times x = x^2
I know that I need a plus and minus sign because 15 is negative and I will need to mulitply a + and a - number to get -15
Next, I have to think of two numbers that multiply to equal 15 and add to be -2 for the -2x portion.
It gets more complicated with 2x^2.. but it works basically the same way by guessing.
There are no AI answers yet. The ability to request AI answers is coming soon!