Question 457640
{{{sqrt(27) + sqrt(12) = sqrt(3*9) + sqrt(3*4)}}}
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{{{sqrt(3*9) = sqrt(9*3)}}}
{{{sqrt(9*3) = sqrt(9)*sqrt(3)}}}
{{{sqrt(9)*sqrt(3) = 3*sqrt(3)}}}
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{{{sqrt(3*4) = sqrt(4*3)}}}
{{{sqrt(4*3) = sqrt(4)*sqrt(3)}}}
{{{sqrt(4)*sqrt(3) = 2*sqrt(3)}}}

Adding we get...
{{{5*sqrt(3)}}}
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Answer:
{{{sqrt(27) + sqrt(12) = 5*sqrt(3)}}}
.
Done