Review cube roots, and try some practice problems.
Log in Landon Whiffin 6 years agoPosted 6 years ago. Direct link to Landon Whiffin's post “How do you figure out lar...” How do you figure out large cube root questions without guessing and checking? • (25 votes) NMclin0505 6 years agoPosted 6 years ago. Direct link to NMclin0505's post “Sometimes what I do is re...” Sometimes what I do is rememebr simple pefect squares. For example, 4=64, 3=27.Sometimes the thing that works the best is just multiplying the number you are figure out by the given factor. (16 votes) andrewmagr24 8 months agoPosted 8 months ago. Direct link to andrewmagr24's post “Is there an easier method...” Is there an easier method? • (5 votes) Heather Tully 8 months agoPosted 8 months ago. Direct link to Heather Tully's post “A calculator 🙃” A calculator 🙃 Don Argos 5 years agoPosted 5 years ago. Direct link to Don Argos's post “But (-2)*(-2)*(2) also eq...” But (-2)*(-2)*(2) also equals 8. • (3 votes) aayushbhakey 5 years agoPosted 5 years ago. Direct link to aayushbhakey's post “But -2 and 2 aren't the s...” But -2 and 2 aren't the same number, so you aren't technically cubing it, since cubes are the SAME number multiplied three times. Hope this helped! (14 votes) Zion 3 years agoPosted 3 years ago. Direct link to Zion's post “I don't understand the pr...” I don't understand the problem: Finding the cube root of 64 to the 3 power? Doesn't make sense. • (4 votes) Ian Pulizzotto 3 years agoPosted 3 years ago. Direct link to Ian Pulizzotto's post “The process of taking the...” The process of taking the cube root is the reverse of the process of taking a number to the 3 power. So these processes undo each other; therefore, the answer is just 64. Have a blessed, wonderful day! (8 votes) Emma a year agoPosted a year ago. Direct link to Emma's post “i dont understand this, h...” i dont understand this, how do i do it? (i didnt learn this) David Severin a year agoPosted a year ago. Direct link to David Severin's post “cube roots are inverses o...” cube roots are inverses of cubic function, so if 3^3=27, the cube rott of 27=3. If you prime factor 27, you get 27=9*3=3*3*3, so on cube roots, you need three of the same number multiplied together which will come out as a single 3. (8 votes) Andrew Zhu a year agoPosted a year ago. Direct link to Andrew Zhu's post “Is there any way you can ...” Is there any way you can find cube roots in your head or any way like doing long division? • (5 votes) yumi 10 months agoPosted 10 months ago. Direct link to yumi's post “What I do is using my own...” What I do is using my own knowledge. For example, I'm trying to find 3v729 and I know that 8^3 is 512, so the answer must be bigger than 8. Then, I realized it might be 9 so I did the multiplication, and turns out I'm right. It's basically an estimation. I hope this helps! (2 votes) liz fassinou 4 years agoPosted 4 years ago. Direct link to liz fassinou's post “I was supposed to factor ...” I was supposed to factor out 216 but when I started with 2, I ended up with 2,2,2,3,9 and that doesn't work. I only got the right answer when I started with six. Why does 2 not work? • (3 votes) lemonomadic 4 years agoPosted 4 years ago. Direct link to lemonomadic's post “2 works! Let's try it.We...” 2 works! Let's try it. Answer- 2, 2, 2, 3, 3, 3 (6 votes) gordonmalik2020 a year agoPosted a year ago. Direct link to gordonmalik2020's post “i dont get it” i dont get it • (3 votes) Michelle1619 a year agoPosted a year ago. Direct link to Michelle1619's post “If you tell me what parti...” If you tell me what particular part you don't understand, i might be able to help you. (4 votes) bommidibharathi a year agoPosted a year ago. Direct link to bommidibharathi's post “Is there an easier way to...” Is there an easier way to find the cube root • (4 votes) Riley 7 years agoPosted 7 years ago. Direct link to Riley's post “So if the question is the...” So if the question is the cubed root of 64, would that mean (8*8=64) = (64/3)? • (2 votes) Ethan Lee 6 years agoPosted 6 years ago. Direct link to Ethan Lee's post “No, because when you cube...” No, because when you cube something, you multiply it by itself three times, 4*4*4=64 (6 votes)Want to join the conversation?
So aren’t there then two values for the cubed root of 8: 2 and -2?
5^3=125, so cube root of (125)=cube root (5^3) = 5.
We factor out a 2 from 216. We get 108
We factor out a 2 from 108. We get 54
We factor out a 2 from 54. We get 27
We factor out a 3 from 27. we get 9
We factor out a 3 from 9. We get 3
We factor out a 3 from 3. We get 1
Check- 2 × 2 × 2 × 3 × 3 × 3 = 216!
And we got it righty right!
Perhaps you did the Check wrong.
Well you have to factor 9 also in your answer- 2,2,2,3,9
9 can be factored as 3 × 3
So your answer is written as 2, 2, 2, 3, 3, 3
