SOLUTION: Hi...I have two problems I can seem to get correct... multipy sqrt7(sqrt3-sqrt7) ----------- ----------- multiply and simplify sqrt28a^9b * sqrt8a^10b^8

Algebra ->  Square-cubic-other-roots -> SOLUTION: Hi...I have two problems I can seem to get correct... multipy sqrt7(sqrt3-sqrt7) ----------- ----------- multiply and simplify sqrt28a^9b * sqrt8a^10b^8      Log On


   

Question 327672: Hi...I have two problems I can seem to get correct...
multipy
sqrt7(sqrt3-sqrt7)
------------------------
multiply and simplify
sqrt28a^9b * sqrt8a^10b^8
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
multipy
sqrt7(sqrt3-sqrt7)
---
= sqrt(21) - 7
========================
------------------------
multiply and simplify
sqrt(28a^9b) * sqrt(8a^10b^8)
---
= sqrt(4a^8*7ab) * sqrt(4a^10b^8*2)
---
= 2a^4*sqrt(7ab) * 2a^5b^4*sqrt(2)
---
= 4a^9b^4*sqrt(14ab)
=========================
Cheers,
Stan H.