Question

(-3x)^2 (-2^4x^2) help!!

Answer 1

Is it this? \[(-3x)^{2}(-2^{4x ^{2}})\]

Answer 2

the x is bigger

Answer 3

on the second one

Answer 4

So this? \[(-3x)^{2}(-2^{4^{x ^{2}}})\]

Answer 5

Or this\[(-3x)^{2}(-2^{4}x ^{2})\]

Answer 6

yes that

Answer 7

can you help me?

Answer 8

The last one I put right?

Answer 9

Well you know -2^4 is 16. So you have \[(-3x)^{2}(16x ^{2})\]First you can distribute the square into -3x, so it would look like\[(-3^{2}x ^{2})(16x ^{2})=(9x ^{2})(16x ^{2})\]

Answer 10

Then just multiply from here.

Answer 11

the answer i got was marked wrong

Answer 12

Hmm... I'm not really sure how its wrong. Sorry

Answer 13

can you help me with another?

Answer 14

Sure

Answer 15

(7K-1)^2

Answer 16

\[(7k-1)^{2}=(7k-1)(7k-1)\]Do you know how to FOIL?

Answer 17

yes thank how would i know when to use foil though

Answer 18

thanks

Answer 19

Usually, there are various times when you would use FOIL. For example:
(x-2)^2, or (2x+5)(3x+4) or (x^2+10)(x+5). There are many more examples using FOIL but that's all I can think of right now.

Answer 20

Usually it would be in a form of (ax+b)(cx+d)

Answer 21

thank you

Answer 22

No problem, is there another math problem you need help with?

Answer 23

find this kind of confusing!!

Answer 24

no thank you its just for the last one i put 144k^4 but it marked it wrong the first one you hepled me with

Answer 25

I'm currently in Calculus II in college and Series is even more of a pain than this.

Answer 26

yea wow that sounds crazy lol

Answer 27

Yes sometimes I even question myself if I'm really suppose to be in this class.

Answer 28

lol what school?

Answer 29

San Diego Mesa College

Answer 30

oh cool

Answer 31

so the first one would be 144x^4

Answer 32

Is 144x^4 incorrect?

Answer 33

yes lol but i dont know another to do it

Answer 34

Huh.... Sorry I'm having a brain fart here but I can't find what is wrong, give me a sec.

Answer 35

Unless, you would have to take the x^2 out so
\[(9x ^{2})(16x ^{2})=x ^{2}(9)(16)\]Then that would equal to\[144x ^{2}\]But I'm not sure if that would be right.