Question
sqrt(s+2 sqrt(6))+sqrt(8-2 sqrt(15))
Solution
4.5
(219 Votos)
Dafne
Avançado · Tutor por 1 anos
Resposta
To simplify the expression
, we need to find values of
that make the expression simpler.First, let's consider the term
. We can try to express it in the form
.Assume:
Squaring both sides:
By comparing rational and irrational parts, we get:
Solving these equations:
The solutions to these equations are the roots of the quadratic equation:
Solving this quadratic equation:
Thus,
and
. Therefore:
Now, consider the term
. We want to find
such that:
Squaring both sides:
By comparing rational and irrational parts, we get:
Solving these equations:
The solutions to these equations are the roots of the quadratic equation:
We need to find
such that the roots are real numbers. Let's assume
and
:
Thus:
Putting it all together:
Therefore, the simplified form of the given expression is: