Answer:
Looking at the graphic, if a 45-45-90 triangle has a hypotenuse of 1, then each of the side lengths equal 1 / square root (2)
Source: https://www.1728.org/trig2.htm
Step-by-step explanation:
The simplified expression of
is 
The expression is given as:

Expand the expression

Factor out 2

Combine the radicals

Expand the expression

Evaluate the roots

Expand

Hence, the simplified expression of
is 
Read more about simplified expressions at:
brainly.com/question/8008182
Answer:
2(n) or 2n
Step-by-step explanation:
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I know what it is. it is (V-7)(V+1)
Sería 37975 porque le tienes que restar el procentaje que se le ha añadido para saber cómo era antes