# Questions on Algebra: Square root, cubic root, N-th root answered by real tutors!

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 Algebra: Square root, cubic root, N-th root Solvers Lessons Answers archive Quiz In Depth

 Question 552266: I don't know how to simplify 2√5+3√5. Can you help me learn how to do that? Thank you so much, Lydia Click here to see answer by jim_thompson5910(28598)

 Question 552265: I have a question about simplifying square roots. I have 2√5+3√5 how do I simplify? Click here to see answer by jim_thompson5910(28598)

 Question 552353: simplify and write the answer in exponential form: My daughter and I think the answer is POSITIVE but the teacher's answer is NEGATIVE. Thank you for helping me Help my daughter. Very Respectfully Tulio Click here to see answer by Alan3354(30993)

 Question 552582: How do you factor the square root of 252x^3y^4? I have a bunch of problems like this, this is just the first one. I have asked several people for help but we are all stumped. I would very much appreciate a simple explanation of how to do this. Click here to see answer by vleith(2825)

 Question 552642: Find the least number of 6 digits which is a perfect square.? Click here to see answer by AnlytcPhil(1278)

 Question 552648: Find the greatest number of 6 digits which is a perfect square.? Click here to see answer by fcabanski(874)

 Question 553000: Use the difference-of-squares pattern to factor. x^6 - 9y^2 = Comment: I'm having trouble figuring out how to factor the x^6 , none of the examples in the chapter have none square x values. also, none of the rules describe how to do it with x^6. Thank you, Anthony Click here to see answer by nerdybill(6963)

 Question 553511: I need to complete the square and find the two "x" answers. 2x^2-26=0 I know to add 139 to each side but dont know where to go from there! Click here to see answer by rapaljer(4667)

 Question 553525: Solve this equation by using the square root property: 4x^2-28x+49=5 I do school online so all I have as a resource is the text book and the only examples they gave where only problems like this: x^2+10x+25=49 (x+5)^2=49 x+5=±√49 x+5=±7 x=-5±7 x=-5+7 or x=-5-7 x=2 or x=-12 {2,-12} I understand how they did that problem but they showed no examples on what to do if x^2 had a number in front of it like 4x^2. Click here to see answer by rapaljer(4667)

 Question 553803: #33 write a quadratic equation in the varible x having the given # as a solution solution = 8 Click here to see answer by Alan3354(30993)

 Question 554682: Hello! I have tried this a million times! My homework is full of this and i don't understand!: √(x-3) = √(x+15)-2 Can you take me through the steps to solve it please?? Click here to see answer by Edwin McCravy(8922)

 Question 556263: How do I rationalise denominators?? :( I mean things like (√2 + 2√5)/(√5 - √2) Thanks! Click here to see answer by scott8148(6628)

 Question 556986: how do you complete square roots when they are used in an algerbraic experssion using exponets? Click here to see answer by Alan3354(30993)

 Question 557270: I have to find the nth term in some equations for my exams on monday and i forgot how to do it. The terms are 1 2 3 4 The values are 3 7 11 15 and i have to find the 20th term How do i do it? Click here to see answer by stanbon(57424)

 Question 557641: Find the following, √16:((-2)^(16)) I'm not sure where to start but I have to question if the root is even a real number? Click here to see answer by jim_thompson5910(28598)

 Question 557571: If someone can help me I appreciate it. Thanks Question 1: Use a calculator to approximate the number (round to 3 decimal places): (2.5) with negative 1.9 to the second power of (2.5) + 3 square root of 12. Click here to see answer by richard1234(5390)

 Question 558608: Hi could someone please help me, I have an Expression that needs rationalizing by taking the conjugate: 3√10/6-8√3 it says the answer is -3√10-4√30/26 But I got nothing like this, here is what I tried: I multiplied the top and bottom by the conjugate of the denominator 6-8√3, which I thought was 6+8√3. So I did this: 3√10/ *6+8√3 = 18√10+8√3*3√10/ 6-8√3 *6+8√3 36-64*3 Obviously this is not even close to the correct answer, could someone please explain to me all the steps I need to do and where I am going wrong. Many Thanks Jim. Click here to see answer by Alan3354(30993)

 Question 558683: the square root of 7 plus one divided by the square root of 7 minus 2? simplify Click here to see answer by solver91311(16897)

 Question 558894: use the square root property to solve the equation (x+1)^2=9 2) x^2=121 Click here to see answer by Theo(3472)