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Mathematics 18 Online
OpenStudy (joehoffy):

someone tell me what this guy is trying to say PLEASE!

OpenStudy (joehoffy):

What is the simplified expression for 3 to the power of negative 4 multiplied by 2 to the power of 3 multiplied by 3 to the power of 2 whole over 2 to the power of 4 multiplied by 3 to the power of negative 3? 3 over 2 3 to the power of 2 over 2 to the power of 2 3 to the power of 2 over 2 2 to the power of 4 over 3

OpenStudy (campbell_st):

so your question is \[\frac{3^{-4} \times 2^3 \times 3^2}{2^4\times 3^{-3}}\]

OpenStudy (joehoffy):

basically.

OpenStudy (campbell_st):

you can simplify the numerator by looking at the terms with the same base remember when multiplying add the powers \[m^a \times m^b = m^{a + b}\] so apply this to the base 3 terms in the numerator

OpenStudy (campbell_st):

next the law for division is subtract the powers of the same base \[\frac{m^a}{m^b} = m^{a - b}\] you need to use these to laws to simplify

OpenStudy (joehoffy):

okay.

OpenStudy (joehoffy):

but idk how to, im so lost omfg. i have 2 more hrs of school after this smh.

OpenStudy (campbell_st):

ok... what is \[3^{-4 + 2} = 3^?\] what power do you get...?

OpenStudy (joehoffy):

is there some kind of special calculator needed for that?

OpenStudy (campbell_st):

nope... its just -4 + 2 = ?

OpenStudy (joehoffy):

-2

OpenStudy (campbell_st):

great so \[3^{-4} \times 3^2 = 3^{-2}\] so the problem is now \[\frac{3^{-2} \times 2^3}{3^{-3} \times 2^4}\] does that make sense..

OpenStudy (joehoffy):

i guess.

OpenStudy (campbell_st):

now you need to use the rule for division... which means you subtract the powers with the same base... \[3^{-2} \div 3^{-3} = 3^{-2 -(-3)}\] what would you get as an answer..? and \[2^3 \div 2^4 = 2^{3 - 4} \] what do you think the power will be..?

OpenStudy (campbell_st):

if you have a scientific calculator, you can plug the information in the way it's written and you'll get the answer

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