Question

Can someone please help me fix this math question?
Please? I will fan and give a medal!!
Please help me to simplify this rational expression -
(4x^2-6x-18) (x^2+1)
------------ * ----------
(x+1) (x^2-6x+9)

Answer 1

These are the Steps I did-
(4x^2-6x-18)(x^2+1)
----------------------
(x+1)(x^2-6x+9)
(4x^2-6x-18) =
2(2x^2-3x-9)=
2(2x^2-6x+3x-9)=
2(2x^2-6x)+(3x-9)=
2(2x^2(x-3)+3(x-3)
2(x-3)(2x+3)=
2x^3
-------------
(x+1)(x^2-6x+9)

Answer 2

This is what my teacher said was wrong -
Make your steps look like this example -
(8y) (7x)
------ * ------
(14x^2) (8z^3)

Steps--

1 1 1 1 1
2*2*2*y * 7 * z'
----------------------
2*7*x*x 2*2*2*z*z*z
1 1 1 1 1

1*1*1*y*1*1
-------------------
2*1*1*x*1*1*1*z*z*z

y
------
2xz^3