Question

(5-√5)² (5+ √5)

maths​

Answer 1

Answer:

55.27864045

Step-by-step explanation:

Answer 2

Answer:

I know that (5 - 1)²

is the identity:

(a - b)²

which ends as:

a² - 2ab + b²

which would make that:

a = 5

b = 1

5² - 2(5X1) + 1²

= (5 X 5) - ((2 X 5) X (2 X 1)) + (1 X 1)

= 25 - (10 X 2) + 1

= 25 - 20 + 1

= 5 + 1

=6.