SOLVE (√5+1)² - (√5-1)² =
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Step-by-step explanation:
- (√5+1)^2 - (√5-1)^2
- (√5)^2+2*√5*1+(1)^2 - (√5)^2-2*√5*1+(1)^2
- 5+2√5+1 - 5-2√5+1
- 1+1
- 2
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