carolyn643 said:
I am just getting started doing these. The problem is( -5xy2z)(-3x2yz5) (15x3y3z6) =
2 5 = 10
3x3y3z6
2 . The numbers behind the exponents is the degree of power. I don't kow how to put them in, can you help me?
Carolyn
(-5 x y[sup:xb4dz8jw]2[/sup:xb4dz8jw] z()*(-3x[sup:xb4dz8jw]2[/sup:xb4dz8jw] y z[sup:xb4dz8jw]5[/sup:xb4dz8jw])*(15 x[sup:xb4dz8jw]3[/sup:xb4dz8jw] y[sup:xb4dz8jw]3[/sup:xb4dz8jw] z[sup:xb4dz8jw]6[/sup:xb4dz8jw])
NOTE...I typed the exponents using the "sup" button in the row of symbols just above the text window.
This is all multiplication. The Commutative and Associative properties assure us that we can write the factors in a multiplication in any order we want, and also group them any way we want. So, I'm going to take all of those factors and do some rearranging.
(-5 * -3 * 15) * (x*x[sup:xb4dz8jw]2[/sup:xb4dz8jw]*x[sup:xb4dz8jw]3[/sup:xb4dz8jw]) * (y[sup:xb4dz8jw]2[/sup:xb4dz8jw]*y*y[sup:xb4dz8jw]3[/sup:xb4dz8jw]) * (z*z[sup:xb4dz8jw]5[/sup:xb4dz8jw]*z[sup:xb4dz8jw]6[/sup:xb4dz8jw])
Now, multiply the numbers, multiply the x's, multiply the y's, and multiply the z's. Remember that when you multiply powers of the same base, you ADD the exponents. For example, a*a[sup:xb4dz8jw]3[/sup:xb4dz8jw] = a[sup:xb4dz8jw]1 + 3[/sup:xb4dz8jw] or a[sup:xb4dz8jw]4[/sup:xb4dz8jw].
Can you take it from here?
