SOLUTION: what is (5radicand2 + 3radicand5)(2radicand10 - 5) im helping my daughter and I can not fiqure this one out

Question 422140: what is (5radicand2 + 3radicand5)(2radicand10 - 5)
im helping my daughter and I can not fiqure this one out
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
(5radicand2 + 3radicand5)(2radicand10 - 5)
-----
(5sqrt(2)+3sqrt(5))(2sqrt(10)-5)
----
= 5sqrt(2)[2sqrt(10)-5] + 3sqrt(5)[2sqrt(10)-5]
----
= 10sqrt(20)-25sqrt(2) + 6sqrt(50) - 15sqrt(5)
-----
= 10*2sqrt(5)-25sqrt(2) + 6*5sqrt(2) - 15sqrt(5)
-----
= 20sqrt(5)-15sqrt(5) - 25sqrt(2)+30sqrt(2)
----
= 5sqrt(5) + 5sqrt(2)
----
= 5[sqrt(5)+sqrt(2)]
=============================
Cheers,
Stan H
============

RELATED QUESTIONS
HI! I cant fiqure this one. Im pretty bad in math I hope you can solve my problem if not... (answered by josgarithmetic,greenestamps)

Still helping my daughter, this one is tough. c=5/9(f-32) solve for... (answered by scott8148)

Solve and graph the solution set of 4x > 7x + 20. If a unique solution does (answered by jim_thompson5910)

I'm sorry, I need help again. What is the radius of a circle whose area is 154 square... (answered by rapaljer)

I'm helping my daughter with her algebra and i can not rememeber the formual for this... (answered by Alan3354,Theo)

ok im helping my little cousin solve this problem and we havent been able to can u please (answered by checkley71)

I am having hard to helping my daughter with this can you please help thank you... (answered by jim_thompson5910)

ok, this is pre-algerbra but you guys didn't have that, anyway I am doing this on a... (answered by stanbon,MathLover1,josmiceli)

im helping my daughter with homework and were on a prob. 3n =426 someone please HELP (answered by jim_thompson5910)