Question

simplify your (2√5-√2)²​

Answer 1

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Answer 2

Step-by-step explanation:

using the first identity (a-b)^2 =a^2 -2ab+ b^2

we get

(2√5)^2 -2×2√5×√2 + (√2)^2

= (4×5) - 4√10 + 2

= 20 - 4√10 + 2

= 22-4√10

hope it helps