Simplify x to the fourth power minus 3 times x cubed all over x squared minus 9.

−1
x minus 3 all over x plus 3
x cubed all over x plus 3
1 over 3
@johnweldon1993

Question

Simplify x to the fourth power minus 3 times x cubed all over x squared minus 9.
 	
	−1
	x minus 3 all over x plus 3
	x cubed all over x plus 3
	1 over 3
@johnweldon1993

johnweldon1993 · Answer

$$\large \frac{x^4 - 3x^3}{x^2 - 9}$$

Okay...first, what can we do with that denominator? how can we simplify that?

anonymous · Answer

divide 9 and 3?

johnweldon1993 · Answer

Not quite...my first step would be to factor that bottom...

Sidebar here...if we have

x^2 + 3x + 4 = 0    how do we solve that? we factor right? we think...what 2 numbers multiply to make 4....but add to make 3? etc...

here...we have the same thing

We have x^2 + 0x - 9         what 2 numbers multiply to make -9....but add to make 0?

anonymous · Answer

what?