SOLUTION: I am supposed to multiply: (7-sqrt6)*(2+ sqrt 6) Is the answer 14-6=8?

Question 226633: I am supposed to multiply:
(7-sqrt6)*(2+ sqrt 6)
Is the answer 14-6=8?
Found 2 solutions by RAY100, checkley77:
Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
To multiply binomials we use distribution or FOIL
.
(7-sqrt6)(2+sqrt6)
.
(7*2) + 7 sqrt6 -2sqrt6 +(-sqrt6)(sqrt6)
.
14 + 5sqrt6 -6
.
8 +5 sqrt6
.
.
check,,,,,both original and answer = 20.25,,,,using calculator
.

Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
(7-sqrt6)
(2+ sqrt 6)
---------------
14-2SQRT6+7SQRT6-6
14-6+5SQRT6
8*2.4495
8+12.247
20.247 ANS.
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