task/29891746
a² - 5 =(a-√5)*(a+√5)
4a² -7 =(2a -√7)*(2a +√7)
√a +√(3a) =√a(√a+√3)
√(3c) - √(6c) =√(3c) (1 - √2 )
c - 11√c = √c( √c -11)
√(12c) +√(28c) =√(4c) * (√3 +√7) =2√c(√3 +√7)
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task/29891746
a² - 5 =(a-√5)*(a+√5)
4a² -7 =(2a -√7)*(2a +√7)
√a +√(3a) =√a(√a+√3)
√(3c) - √(6c) =√(3c) (1 - √2 )
c - 11√c = √c( √c -11)
√(12c) +√(28c) =√(4c) * (√3 +√7) =2√c(√3 +√7)