Tutors Answer Your Questions about Exponents (FREE)
Question 599629: -2x + -^2x= 4 HOW does this make sense? Its on a pre test for the college entrance test. It doesn't make sense does it? It has me stumped, and I am probably not realizing something that is really obvious. But using brackets, it does not WORK OUT to equal 4?????
Click here to see answer by Alan3354(30983)   |
Question 601287: Please help- I have started the problem, just not sure I am going down the right road....
Raise the quantity in parentheses to the indicated exponent, and simplify the resulting expression. Express answers with positive exponents.
(24y^-1/72x^-3y^4)^2
Here is what I have so far!
72/24=3
(y^-1/3x^-3y^4)^2
(y^-1/3x^-3y^4)^2* y^-4 (which leaves y^-4*y^-1= y^4)
(y^4/3x^-3)^2
PLEASE HELP!!!!!!!!
Click here to see answer by jim_thompson5910(28504) |
Question 602824: ((a^6)(b^-10))^(-3/2) I need this simplified. I have been playing around with it for awhile. The best I myself have come up with is a^-9 b^15 . The simplifier gives me (a^6/b^10)^-3/2 . I KNOW the correct answer is b^15 / a^9 . I would like to know how to solve this. Please help ?
Click here to see answer by stanbon(57246) |
Question 605157: Hi there! I need some help finding out the rule of simplifying the common bases in fractional exponent equations. For example 3 to the 4th power multiplied by 2 to the 3rd power over 3 to the 7th power multiplied by 2 to the 2nd power, all raised to the -2 power equals 729/4. I understand how to turn the -2 to a positive 2 exponent by flipping the bottom part of the equation and putting it on top and then moving the top part of the equation to the bottom. What I do not understand is how I find the common bases before raising each factor to the 2nd power. My book shows that 3 to the 7th power becomes 3 to the 3rd power and that the 2 to the 2nd power is completely cancelled out. My book also shows that the 3 to the 4th power is completely cancelled out and that the 2 to the 3rd power becomes 2 to the 1st power. I don't understand how that happened. If they took the 3 to the 7th exponent and the 3 to the 4th exponent and subtracted the exponents (7-4=3), that makes sense. However, what does not make sense to me is that if that is true, then the 2 to the 2nd power and the 2 to the 3rd power should be (2-3= -1); however, the book shows that it is not a -1 exponent, but a positive 1 exponent. What is the rule here? Thank you :)
Click here to see answer by Alan3354(30983) |
Question 609380: will you help to answer this equation : Find the value of (-8) to the power of three
if the laws of multiplying a negative number and a positive number ( is the exponent 3 a positive number ) the result is a positive number then is the answer (24) ?
Click here to see answer by flame8855(424)  |
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