SOLUTION: Multiply: (5*sqrt7 - 15*sqrt2) * (2*sqrt7 + 6*sqrt2) Rationalize the denominator: sqrt(c)-sqrt(d)/sqrt(c)+sqrt(d) Please help walk me through these problem! I cannot find a

SOLUTION: Multiply: (5sqrt7 - 15sqrt2) * (2sqrt7 + 6sqrt2) Rationalize the denominator: sqrt(c)-sqrt(d)/sqrt(c)+sqrt(d) Please help walk me through these problem! I cannot find a

Question 303584: Multiply:
(5*sqrt7 - 15*sqrt2) * (2*sqrt7 + 6*sqrt2)
Rationalize the denominator:
sqrt(c)-sqrt(d)/sqrt(c)+sqrt(d)
Please help walk me through these problem! I cannot find anything in the book that works with these types of problems! Thank you in advance for your help!!
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
(5*sqrt7 - 15*sqrt2) * (2*sqrt7 + 6*sqrt2)
.
5sqrt7*2sqrt7+5sqrt7*6sqrt2 -15sqrt2*2sqrt7 -15sqrt2*6sqrt2
.
10*7 + 30sqrt7*sqrt2- 30sqrt2*sqrt7-90*2
.
70+0 -180
-110
Ananth
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