5Х2 - 5 =5(х2 -1) =5(Х-1)(5+1)
2а2 -8 =2(a^2 -4) =2(a -2)(a+2)
3ah^2 - 27a = 3a(h^2 -9)= 3a (h -3)(h +3)
2xy^2 -50x =2x(y^2 -25)=2x(y-5)(y+5)
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5Х2 - 5 =5(х2 -1) =5(Х-1)(5+1)
2а2 -8 =2(a^2 -4) =2(a -2)(a+2)
3ah^2 - 27a = 3a(h^2 -9)= 3a (h -3)(h +3)
2xy^2 -50x =2x(y^2 -25)=2x(y-5)(y+5)