Question

A(квадрат)-2корень из 5а+1 ,если а = корень из 5 +4

Answer 1

Теперь правильно? (второе фото)

Answer 2

To find the value of A, let's substitute the given value of a into the expression A^2 - 2√(5a + 1).

Given: a = √5 + 4

Substituting the value of a into the expression: A^2 - 2√(5a + 1) = A^2 - 2√(5(√5 + 4) + 1)

Simplifying the expression within the square root: A^2 - 2√(5√5 + 20 + 1) = A^2 - 2√(5√5 + 21)

Since we don't have any additional information about the value of A or any other equations involving A, we cannot determine its exact value.