SOLUTION: Hello. I am struggling with this equation - (2√7+3)(3√7-4) I know that we are supposed to FOIL so when I worked the problem this is what I got 6√7-8√7+9W
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Question 301130: Hello. I am struggling with this equation - (2√7+3)(3√7-4) I know that we are supposed to FOIL so when I worked the problem this is what I got 6√7-8√7+9√7-12 cant be the right method because the book says the answer is 30+√7. Can someone tell me what I'm doing wrong? Thanks in advance :)
Found 2 solutions by jim_thompson5910, ankor@dixie-net.com:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Hint: . In short,
Also, which means
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
(2√7+3)(3√7-4)
FOIL
:
combine the middle terms
:
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