SOLUTION: OK I have a problem: I have the right answer and I've even had it double checked by my teacher I'm just not sure how I got there.
The problem is: 2√5+3√20 And I know t
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Question 256858: OK I have a problem: I have the right answer and I've even had it double checked by my teacher I'm just not sure how I got there.
The problem is: 2√5+3√20 And I know the right answer is:8√5.
I just can't remember I got from one to the other.
Found 3 solutions by CharlesG2, Earlsdon, richwmiller:
Answer by CharlesG2(834) (Show Source): You can put this solution on YOUR website!
" OK I have a problem: I have the right answer and I've even had it double checked by my teacher I'm just not sure how I got there.
The problem is: 2√5+3√20 And I know the right answer is:8√5.
I just can't remember I got from one to the other. "
Let me see if I can help.
2*sqrt(5) + 3sqrt(20)
2*sqrt(5) + 3sqrt(4*5) --> you can take the 4 out from under the radical since it is the square of 2
2*sqrt(5) + 3*2*sqrt(5)
2*sqrt(5) + 6*sqrt(5)
8*sqrt(5) --> the answer
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Substitute 20 = 4*5
Take the square root of 4 (that's 2) and move it out from under the radical to get:
Simplify and add the radicals.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Your story doesn't make sense. Judge Judy is fond of saying if a story doesn't make sense it is probably not true. A more believable story is that you found the answer in the back of the book and don't want to or don't know how to solve the problem.
== *==
So +=
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