Question

(√5-2)^2. please help​

Answer 1

Answer:

(a-b)^2 = a2 + b2 - 2ab

= (√5)^2 + 2^2 -2(2)(√5)

= 5 + 4 - 4√5

= 9 - 4√5

Answer 2

Step-by-step explanation:

(√5-2)²

using identity a²+b²-2ab = (a-b) ²

= (√5)²+(2)²-2×√5×2

5+4-4√5

= 9-4√5