SOLUTION: I need to know how to multiply (5- square root of 11) by it's conjugate and simplify. Help please?

Question 176261: I need to know how to multiply (5- square root of 11) by it's conjugate and simplify. Help please?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
I need to know how to multiply (5- square root of 11) by it's conjugate and simplify.
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Conjugates multiplication takes the following form:
(a - sqrt(b))(a + sqrt(b)) = a^2 -b
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(5- sqrt(11))(5 + sqrt(11)) = 25 - 11 = 14
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Cheers,
Stan H>
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