SOLUTION: Could I please have some help with this problem. I am really back at this when it comes to square roots. Thank you (3- 2square root7)(3+ 2square root 7)

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Could I please have some help with this problem. I am really back at this when it comes to square roots. Thank you (3- 2square root7)(3+ 2square root 7)      Log On


   



Question 327308:
Could I please have some help with this problem. I am really back at this when it comes to square roots. Thank you
(3- 2square root7)(3+ 2square root 7)

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
(3- 2square root7)(3+ 2square root 7)
This is similar to (a - b)*(a + b) = a^2 - b^2
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%283-+2sqrt%287%29%29%283%2B+2sqrt%287%29%29
= 3%5E2+-+%282sqrt%287%29%29%5E2
= 9 - 4*7
= -19