Homework Help: Math correct

Posted by Bryan on Tuesday, December 16, 2008 at 9:37am.

AM I RIGHT??

simplify
(2x^2y^2z)^2(x^4y)^5

I CAME WITH 4x^13y^9z^2 FOR THE ANSWER..

convert the number to scientifc notation
13,550,000,000

I CAME WITH 1.355x10^9 FOR THE ANSWER

Math correct - bobpursley, Tuesday, December 16, 2008 at 9:42am
On the second, no. try 10^10. Think about that.

Now on the first, no.
expand the first part:
2x^2y^2z^2 squared
4x^4 y^4 z^4
Now the second part.
x^4 y to the fifth..
x^20 y^5

Now combine them by adding exponents.
Math correct - Bryan, Tuesday, December 16, 2008 at 9:48am
okay. is it 4x^36y^20z^2
Math correct - bobpursley, Tuesday, December 16, 2008 at 10:49am
No. You are missing something.

the two to combine are:
(4x^4 y^4 z^4)(x^20 y^5)

Take the y exponents. What is 4+5?

When multiplying add the exponents. When taking to a power, multiply.

x³ * x^k=x^3+k

(x^m)ⁿ =x^mn

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