# Multiply

• November 26th 2009, 12:28 AM
westdivo
Multiply
Multiply
(-4x-3y) (5y-12z) =

(x2 + 8x + 7) ÷ (x + 6)=
• November 26th 2009, 02:23 AM
HallsofIvy
Quote:

Originally Posted by westdivo
Multiply
(-4x-3y) (5y-12z) =

Use the "distributive law", twice;
-4x(5y- 12z)- 3y(5y- 12z) is one use of it

-4x(5y)- 4x(12z)- 3y(5y)- 3y(-12z) is the second. Multiply those.

(x2 + 8x + 7) ÷ (x + 6)=[/QUOTE]
So this is $\frac{x^2+ 8x+ 7}{x+ 6}$. It should be obvious that x+ 6 is NOT a factor of the numerator (6 is not a factor of 7) so you cannot reduce it any more.
• November 26th 2009, 03:20 AM
stapel
If you're having trouble with the distribution for the multiplication, try another method here.

To learn how to do polynomial division, try here. (Wink)